Fair Value of Financial Instruments - Quantitative Information (Details) - Appraisal of collateral valuation technique [Member] - Level 3 [Member] - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Impaired loans and leases [Member]
Additional quantitative information about assets measured at fair value on a nonrecurring basis [Abstract]
Assets, Fair Value	$ 6,102	$ 5,946
Other real estate owned [Member]
Additional quantitative information about assets measured at fair value on a nonrecurring basis [Abstract]
Assets, Fair Value	$ 1,471	$ 2,384
Minimum [Member] | Impaired loans and leases [Member]
Additional quantitative information about assets measured at fair value on a nonrecurring basis [Abstract]
Range (Weighted Average) of Appraisal adjustments (in hundredths)	27.40%	62.30%
Range (Weighted Average) of Liquidation expenses (in hundredths	12.80%	15.40%
Minimum [Member] | Other real estate owned [Member]
Additional quantitative information about assets measured at fair value on a nonrecurring basis [Abstract]
Range (Weighted Average) of Appraisal adjustments (in hundredths)	61.50%	54.10%
Range (Weighted Average) of Liquidation expenses (in hundredths	5.60%	14.70%
Maximum [Member] | Impaired loans and leases [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%
Maximum [Member] | Other real estate owned [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%
Weighted Average [Member] | Impaired loans and leases [Member]
Additional quantitative information about assets measured at fair value on a nonrecurring basis [Abstract]
Range (Weighted Average) of Appraisal adjustments (in hundredths)	12.30%	13.70%
Range (Weighted Average) of Liquidation expenses (in hundredths	5.20%	6.50%
Weighted Average [Member] | Other real estate owned [Member]
Additional quantitative information about assets measured at fair value on a nonrecurring basis [Abstract]
Range (Weighted Average) of Appraisal adjustments (in hundredths)	32.50%	17.10%
Range (Weighted Average) of Liquidation expenses (in hundredths	5.60%	6.00%