Other Assets - Summary of Other Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred tax asset, net	$ 30,882	$ 36,440
Prepaid expense	2,673	3,062
Software	2,054	1,290
Advanced compensation	327	673
Capital Trusts	1,700	1,696
Investment in Low Housing Tax Credit Funds	18,698	4,223
Miscellaneous other assets	3,762	1,207
Total other assets	$ 60,096	$ 48,591