Fair Value - Schedule of losses recognized on assets measured at fair value on non-recurring basis (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Fair Value
Losses recognized on loans	$ 0	$ 0	$ 0	$ 3
Impaired loans | Significant Unobservable Inputs (Level 3)
Fair Value
Impaired loans carried at fair value of collateral	$ 1,806		$ 1,806		$ 2,557
Real estate owned | Significant Unobservable Inputs (Level 3)
Fair Value
Real estate owned					$ 360