Variable Interest Entities - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) Entity	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Variable Interest Entity [Line Items]
Payments to Acquire Additional Interest in Subsidiaries	$ 0	$ 7,971	$ 0
Deferred Tax Assets, Net	$ 0	40,624
Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Count of VIEs | Entity	2
Variable Interest Entity, Non consolidated, Carrying amount, Assets	$ 62,187
Variable Interest Entity, Nonconsolidated, Carrying Amount, Liabilities	55,989
Variable Interest Entity, Financial or Other Support, Amount	148
Maximum Exposure to loss related to VIEs	3,780
Investment in VIEs	5,322
Noncontrolling Interest [Member]
Variable Interest Entity [Line Items]
Deferred Tax Assets, Net		$ 1,729
Borrowings [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Nonconsolidated, Carrying Amount, Liabilities	$ 2,269