Loans Receivable and Allowance for Loan Losses - Schedule of FDIC Loss Sharing Receivable (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
FDIC Indemnification Asset [Roll Forward]
Ending balance, prior year	$ (2,083)	$ 2,320
Increased (decreased) estimated cash flows	(477)	671
Other activity, net	(304)	134
Cash payments to the FDIC	320	302
Ending balance	(2,544)	3,427
Provision for loan losses	1,503	3,635
Effect attributable to FDIC loss share arrangements	477	(671)
Provision for loan losses	$ 1,980	$ 2,964