Fair Value of Financial Instruments - Quantitative Information (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Level 1 [Member]
Additional quantitative information about assets measured at fair value on a nonrecurring basis [Abstract]
Loans and leases held for sale	$ 0
Level 2 [Member]
Additional quantitative information about assets measured at fair value on a nonrecurring basis [Abstract]
Loans and leases held for sale	0
Level 3 [Member]
Additional quantitative information about assets measured at fair value on a nonrecurring basis [Abstract]
Loans and leases held for sale	205
Appraisal of collateral valuation technique [Member] | Impaired loans and leases [Member] | Level 3 [Member]
Additional quantitative information about assets measured at fair value on a nonrecurring basis [Abstract]
Impaired Loans And Leases Fair Value	2,660	$ 6,102
Appraisal of collateral valuation technique [Member] | Other real estate owned [Member] | Level 3 [Member]
Additional quantitative information about assets measured at fair value on a nonrecurring basis [Abstract]
Foreclosed Properties Valued On Nonrecurring Basis	$ 909	$ 1,471
Appraisal of collateral valuation technique [Member] | Minimum [Member] | Impaired loans and leases [Member] | Level 3 [Member]
Additional quantitative information about assets measured at fair value on a nonrecurring basis [Abstract]
Range (Weighted Average) of Appraisal adjustments (in hundredths)	0.00%	0.00%
Range (Weighted Average) of Liquidation expenses (in hundredths	0.00%	0.00%
Appraisal of collateral valuation technique [Member] | Minimum [Member] | Other real estate owned [Member] | Level 3 [Member]
Additional quantitative information about assets measured at fair value on a nonrecurring basis [Abstract]
Range (Weighted Average) of Appraisal adjustments (in hundredths)	0.00%	0.00%
Range (Weighted Average) of Liquidation expenses (in hundredths	0.00%	0.00%
Appraisal of collateral valuation technique [Member] | Maximum [Member] | Impaired loans and leases [Member] | Level 3 [Member]
Additional quantitative information about assets measured at fair value on a nonrecurring basis [Abstract]
Range (Weighted Average) of Appraisal adjustments (in hundredths)	(20.00%)	(27.40%)
Range (Weighted Average) of Liquidation expenses (in hundredths	(7.90%)	(12.80%)
Appraisal of collateral valuation technique [Member] | Maximum [Member] | Other real estate owned [Member] | Level 3 [Member]
Additional quantitative information about assets measured at fair value on a nonrecurring basis [Abstract]
Range (Weighted Average) of Appraisal adjustments (in hundredths)	(45.50%)	(61.50%)
Range (Weighted Average) of Liquidation expenses (in hundredths	(5.00%)	(5.60%)
Appraisal of collateral valuation technique [Member] | Weighted Average [Member] | Impaired loans and leases [Member] | Level 3 [Member]
Additional quantitative information about assets measured at fair value on a nonrecurring basis [Abstract]
Range (Weighted Average) of Appraisal adjustments (in hundredths)	(11.60%)	(12.30%)
Range (Weighted Average) of Liquidation expenses (in hundredths	(3.80%)	(5.20%)
Appraisal of collateral valuation technique [Member] | Weighted Average [Member] | Other real estate owned [Member] | Level 3 [Member]
Additional quantitative information about assets measured at fair value on a nonrecurring basis [Abstract]
Range (Weighted Average) of Appraisal adjustments (in hundredths)	(22.10%)	(32.50%)
Range (Weighted Average) of Liquidation expenses (in hundredths	(5.00%)	(5.60%)
Sales prices [Member] | Loans and leases held for sale [Member] | Level 3 [Member]
Additional quantitative information about assets measured at fair value on a nonrecurring basis [Abstract]
Loans and leases held for sale	$ 205
Sales prices [Member] | Minimum [Member] | Loans and leases held for sale [Member] | Level 3 [Member]
Additional quantitative information about assets measured at fair value on a nonrecurring basis [Abstract]
Range (Weighted Average) of Liquidation expenses (in hundredths	0.00%
Sales prices [Member] | Maximum [Member] | Loans and leases held for sale [Member] | Level 3 [Member]
Additional quantitative information about assets measured at fair value on a nonrecurring basis [Abstract]
Range (Weighted Average) of Liquidation expenses (in hundredths	(4.90%)
Sales prices [Member] | Weighted Average [Member] | Loans and leases held for sale [Member] | Level 3 [Member]
Additional quantitative information about assets measured at fair value on a nonrecurring basis [Abstract]
Range (Weighted Average) of Liquidation expenses (in hundredths	(4.90%)