Mortgage Servicing Rights - Summary of Mortgage Banking Income, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Servicing Asset [Abstract]
Loan servicing fees	$ 3,940	$ 4,085	$ 4,189
Net gain on sales of loans	2,021	1,763	6,880
Amortization of MSR	(2,307)	(2,582)	(3,229)
Recovery of valuation allowance on MSR	568	60	5,401
Total mortgage banking income, net	$ 4,222	$ 3,326	$ 13,241