Quarterly report pursuant to Section 13 or 15(d)

Credit Facility - Summary of Required Covenant Included in Loan Agreements (Detail)

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Credit Facility - Summary of Required Covenant Included in Loan Agreements (Detail) - Jun. 30, 2015 - Covenants Threshold [Member] - USD ($)
Total
Line of Credit Facility [Line Items]  
Minimum Liquidity (defined as available borrowings under the Loan Agreements plus unrestricted cash divided by actual borrowings) of greater than: 5.00%
12 month rolling Net Interest Margin of greater than: $ 0
Maximum Debt to Equity Ratio of less than: 4