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Financing Receivables and Investments - Additional Information (Detail) (USD $)
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3 Months Ended | 3 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
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Mar. 31, 2014
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Mar. 31, 2013
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Dec. 31, 2013
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Mar. 31, 2014
Financing Receivable [Member]
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Dec. 31, 2013
Financing Receivable [Member]
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Mar. 31, 2014
Debt Securities [Member]
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Dec. 31, 2013
Debt Securities [Member]
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Mar. 31, 2014
Energy Source LLC [Member]
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Dec. 31, 2013
Energy Source LLC [Member]
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May 31, 2013
Energy Source LLC [Member]
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| Financing Receivable, Recorded Investment [Line Items] | ||||||||||
| Financing receivables and investments | $ 486,800,000 | |||||||||
| Investments with unrealized loss position | ||||||||||
| Investments held-for-sale | 0 | 24,800,000 | 0 | 3,200,000 | ||||||
| Deferred funding obligations | 64,800,000 | 74,700,000 | ||||||||
| Restricted cash | 43,061,000 | 49,865,000 | ||||||||
| Financing receivable allowance | 11,000,000 | |||||||||
| Financing receivable allowance, face amount | 24,000,000 | |||||||||
| Accrued interest income | 0 | |||||||||
| Financial receivable average outstanding balance | 11,800,000 | |||||||||
| Income on investment | 2,382,000 | 475,000 | 100,000 | |||||||
| Maximum exposure loss for variable interest entity | 800,000 | |||||||||
| Other financing receivables on non accrual status | ||||||||||
| Provision for credit losses | ||||||||||
| X | ||||||||||
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- Definition
Investment securities continuous unrealized loss positions fair value. No definition available.
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| X | ||||||||||
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- Definition
Loans Receivable Face Amount No definition available.
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| X | ||||||||||
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- Definition
Provision For Credit Losses No definition available.
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| X | ||||||||||
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- Definition
Variable Interest Entity Maximum Exposure To Loss No definition available.
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| X | ||||||||||
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- Definition
A valuation allowance relating to a written agreement to receive money (at a specified future date(s) within one year from the reporting date (or the normal operating cycle, whichever is longer), consisting of principal as well as any accrued interest) for the portion that is expected to be uncollectible. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of interest expense incurred on a debt or other obligation to related party. No definition available.
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| X | ||||||||||
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- Definition
Amount after accretion (amortization) of discount (premium), and investment expense, of interest income and dividend income on nonoperating securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
An amount representing an agreement for an unconditional promise by the maker to pay the Entity (holder) a definite sum of money at a future date(s) within one year of the balance sheet date or the normal operating cycle, whichever is longer. Such amount may include accrued interest receivable in accordance with the terms of the debt. The debt also may contain provisions including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The aggregate carrying amount, as of the balance sheet date, of liabilities not separately disclosed in the balance sheet. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The face amount of all receivables that will be sold to other entities, including trade and loan receivables. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. This element is for unclassified presentations; for classified presentations there is a separate and distinct element. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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