Fair Value Measurement - Reconciliation of All Assets Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Included in change in fair value of loans held for sale	$ (146)		$ 415
Interest Rate Caps [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance of recurring Level 3 assets at beginning of period	126	$ 419	180	$ 546
Included in other income	28	(75)	103	(73)
Amortization	(130)	(130)	(259)	(259)
Balance of recurring Level 3 assets at end of period	24	$ 214	24	$ 214
Loans Held For Sale, at Fair Value [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance of recurring Level 3 assets at beginning of period	1,608
Included in change in fair value of loans held for sale	(146)		415
Originations	8,377		9,424
Balance of recurring Level 3 assets at end of period	$ 9,839		$ 9,839