Fair Value of Financial Instruments - Level III Significant Unobservable Inputs for Assets Measured at Fair Value on a Nonrecurring Basis (Details) - Non-recurring - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Impaired loans
Quantitative information about assets measured at fair value on a non-recurring basis
Assets, fair value	$ 10,441	$ 14,362
Impaired loans | Level III
Quantitative information about assets measured at fair value on a non-recurring basis
Assets, fair value	$ 10,441	$ 14,362
Impaired loans | Appraisal of collateral | Level III | Minimum
Fair Value Inputs
Appraisal adjustments percentage	20.00%	20.00%
Liquidation expense percentage	5.00%	5.00%
Impaired loans | Appraisal of collateral | Level III | Maximum
Fair Value Inputs
Appraisal adjustments percentage	62.00%	62.00%
Liquidation expense percentage	10.00%	10.00%
Other real estate owned
Quantitative information about assets measured at fair value on a non-recurring basis
Assets, fair value	$ 240	$ 239
Other real estate owned | Level III
Quantitative information about assets measured at fair value on a non-recurring basis
Assets, fair value	$ 240	$ 239
Other real estate owned | Appraisal of collateral | Level III | Minimum
Fair Value Inputs
Appraisal adjustments percentage	20.00%	20.00%
Liquidation expense percentage	5.00%	5.00%
Other real estate owned | Appraisal of collateral | Level III | Maximum
Fair Value Inputs
Appraisal adjustments percentage	30.00%	30.00%
Liquidation expense percentage	10.00%	10.00%