Loans, Net - Narrative (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2016 USD ($) loan_segment loan	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loan segments | loan_segment	3
Proceeds from sales of loans	$ 3,019,000	$ 0
Recorded investment	816,458,000		$ 802,354,000
Charge-offs	372,000	266,000	3,691,000
Recoveries	356,000	$ 54,000	658,000
Interest on non-accrual loans foregone	127,600		$ 342,000
Nonperforming Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales of loans	$ 3,000,000
Number of loans sold | loan	2
Recorded investment	$ 3,100,000
Financing Receivable, No Outstanding Recorded Investment, Number of Loans Sold | loan	12
Charge-offs	$ 359,000
Recoveries	$ 300,000