Allowance for Loan Losses - Summary of Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of year				$ 48,147				$ 47,911	$ 48,147	$ 47,911
Charge-offs									(15,561)	(15,266)
Recoveries									2,224	5,114
Net (Charge-offs) Recoveries									(13,337)	(10,152)
Provision for loan losses	$ 5,586	$ 2,516	$ 4,848	5,014	$ 3,915	$ 3,206	$ 2,059	1,207	17,965	10,388	$ 1,715
Balance at End of Year	52,775				48,147				52,775	48,147	47,911
Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of year				15,043				20,164	15,043	20,164
Charge-offs									(3,114)	(2,787)
Recoveries									692	3,545
Net (Charge-offs) Recoveries									(2,422)	758
Provision for loan losses									7,355	(5,879)
Balance at End of Year	19,976				15,043				19,976	15,043	20,164
Commercial and Industrial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of year				10,853				13,668	10,853	13,668
Charge-offs									(6,810)	(5,463)
Recoveries									722	605
Net (Charge-offs) Recoveries									(6,088)	(4,858)
Provision for loan losses									6,045	2,043
Balance at End of Year	10,810				10,853				10,810	10,853	13,668
Commercial Construction
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of year				12,625				6,093	12,625	6,093
Charge-offs									(1,877)	(3,321)
Recoveries									21	143
Net (Charge-offs) Recoveries									(1,856)	(3,178)
Provision for loan losses									3,230	9,710
Balance at End of Year	13,999				12,625				13,999	12,625	6,093
Consumer Real Estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of year				8,400				6,333	8,400	6,333
Charge-offs									(1,657)	(2,167)
Recoveries									433	495
Net (Charge-offs) Recoveries									(1,224)	(1,672)
Provision for loan losses									(1,081)	3,739
Balance at End of Year	6,095				8,400				6,095	8,400	6,333
Other Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of year				$ 1,226				$ 1,653	1,226	1,653
Charge-offs									(2,103)	(1,528)
Recoveries									356	326
Net (Charge-offs) Recoveries									(1,747)	(1,202)
Provision for loan losses									2,416	775
Balance at End of Year	$ 1,895				$ 1,226				$ 1,895	$ 1,226	$ 1,653