Additional Information about Assets and Liabilities That Are Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2016
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 38,885	$ 36,704
Change in fair value of financial instruments	1,204	3,385
Ending Balance	40,089	40,089
Warrants and investor SARs
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	29,100	26,200
Change in fair value of financial instruments	200	3,100
Ending Balance	29,300	29,300
Junior Subordinated Notes, at Fair Value
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	9,785	10,504
Change in fair value of financial instruments	1,004	285
Ending Balance	$ 10,789	$ 10,789