Fair Value - Valuation Methodology and Unobservable Inputs (Details) - Non-Recurring Basis - Significant Unobservable Inputs (Level 3) - Third Party Appraisal	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Impaired loans carried at fair value of collateral | Minimum
Fair value quantitative information
Adjustment for differences between the comparable sales (as a percent)	(2.00%)	(12.00%)
Impaired loans carried at fair value of collateral | Maximum
Fair value quantitative information
Adjustment for differences between the comparable sales (as a percent)	0.00%	13.00%
Impaired loans carried at fair value of collateral | Weighted Average
Fair value quantitative information
Adjustment for differences between the comparable sales (as a percent)	(1.00%)	1.00%
Real estate owned | Maximum
Fair value quantitative information
Adjustment for differences between the comparable sales (as a percent)		(11.00%)
Real estate owned | Weighted Average
Fair value quantitative information
Adjustment for differences between the comparable sales (as a percent)		(11.00%)