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Fair Value Measurements - Schedule of Reconciliation of Level 3 Investments Available-for-Sale Securities (Detail) (USD $)
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12 Months Ended | ||
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Dec. 31, 2014
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Dec. 31, 2013
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Sep. 30, 2012
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| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | |||
| Balance, beginning of period | $ 3,213,000us-gaap_AvailableForSaleSecurities | ||
| Transfers to / purchases of available-for-sale debt securities | 7,753,000us-gaap_PaymentsToAcquireAvailableForSaleSecurities | 92,522,000us-gaap_PaymentsToAcquireAvailableForSaleSecurities | 254,000us-gaap_PaymentsToAcquireAvailableForSaleSecurities |
| Balance, end of Period | 27,273,000us-gaap_AvailableForSaleSecurities | 3,213,000us-gaap_AvailableForSaleSecurities | |
| Level 3 [Member] | |||
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | |||
| Transfers to / purchases of available-for-sale debt securities |
83,200,000us-gaap_PaymentsToAcquireAvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
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| Sale of available-for-sale debt securities |
(59,600,000)us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
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| Unrealized gain on debt securities transferred to available for sale |
5,000,000us-gaap_AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLossNetOfTax / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
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| Unrealized loss on debt securities |
(1,300,000)hasi_AvailableForSaleSecuritiesDebtSecuritiesGrossUnrealizedGainLoss / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
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| Balance, end of Period |
$ 27,300,000us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
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- Definition
Available For Sale Securities Debt Securities Gross Unrealized Gain (Loss) No definition available.
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- Definition
Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The change in unrealized holding gain (loss), net of tax, on available-for-sale securities included in a separate component of shareholders' equity during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
The cash outflow to acquire debt and equity securities not classified as either held-to-maturity securities or trading securities which would be classified as available-for-sale securities and reported at fair value, with unrealized gains and losses excluded from earnings and reported in a separate component of shareholders' equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The cash inflow associated with the sale of debt securities classified as available-for-sale securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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