Derivatives - Additional Information (Details)	12 Months Ended
	Dec. 31, 2015 USD ($) derivative_swap	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Derivatives, Fair Value [Line Items]
Threshold for collateral requirements	$ 250,000
Collateral posted	216,000	$ 0
Notional amount	$ 21,300,000	23,600,000
Number of instruments | derivative_swap	4
Banking fees and commissions	$ 0	0	$ 180,000
Unfunded lending commitment	71,280,000	39,567,000
Variable to Fixed
Derivatives, Fair Value [Line Items]
Notional amount	$ 10,700,000
Number of instruments | derivative_swap	2
Fixed to Variable
Derivatives, Fair Value [Line Items]
Notional amount	$ 10,700,000
Number of instruments | derivative_swap	2
RML
Derivatives, Fair Value [Line Items]
Unfunded lending commitment	$ 71,300,000	$ 39,600,000