Loans - Schedule of Modified TDRs (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Receivables [Abstract]
Extended maturities	$ 3,061	$ 0
Maturity and interest rate adjustment	253	14,812
Forbearance	5,296	0
Other concession(s)	36,172	0
Total	$ 44,782	$ 14,812