Other Assets - Summary of Other Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred tax asset, net	$ 36,350	$ 37,706
Prepaid expense	2,724	3,378
Software	992	1,327
Advanced compensation	755	908
Capital Trusts	1,694	1,690
Investment in low income housing tax credit funds	4,317
Prepaid Taxes		5,599
Miscellaneous other assets	528	1,127
Total other assets	$ 47,360	$ 51,735