Fair Value - Assets Measured at Fair Value on Non-recurring Basis (Details) - Non-Recurring Basis - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2016
Fair Value
Total	$ 83
Impaired loans carried at fair value of collateral
Fair Value
Total	38
Impaired loans carried at fair value of collateral | Significant Unobservable Inputs (Level 3)
Fair Value
Assets, fair value	2,557	$ 1,744
Real estate owned
Fair Value
Total	45
Real estate owned | Significant Unobservable Inputs (Level 3)
Fair Value
Assets, fair value	$ 360