Fair Value - Valuation Methodology and Unobservable Inputs (Details) - Non-Recurring Basis - Significant Unobservable Inputs (Level 3) - Impaired loans carried at fair value of collateral - Third Party Appraisal	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Minimum
Fair value quantitative information
Adjustment for differences between the comparable sales (as a percent)	(2.00%)	(2.00%)
Maximum
Fair value quantitative information
Adjustment for differences between the comparable sales (as a percent)	0.00%	0.00%
Weighted Average
Fair value quantitative information
Adjustment for differences between the comparable sales (as a percent)	(1.00%)	(1.00%)