Derivative Instruments and Hedging Activities (Details) - Fair Value Hedges - Fair Value Hedging - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
		Jun. 30, 2017	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross notional amount outstanding		$ 5,708	$ 5,958
Derivative liability fair value		$ (186)	$ (282)
Weighted-average interest rate received		3.08%	2.63%
Weighted-average interest rate paid		5.96%	5.96%
Weighted-average maturity (in years)		1 year 4 months 7 days	1 year 10 months 2 days
Fair value of derivative	[1]	$ 197	$ 296

[1] This amount represents the fair value if credit risk related contingent features were triggered.