Commitments, Contingencies, and Credit Risk - Receivables (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Standby Letters of Credit	$ 1,809	$ 1,970
Variable Rate Commitments	89,680	120,173
Fixed Rate Commitments	34,460	29,681
Total Commitments	$ 125,949	$ 151,824
Range of Rates on Fixed Rate Commitments, Minimum	2.60%	2.60%
Range of Rates on Fixed Rate Commitments, Maximum	18.00%	18.00%