Other Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Other Liabilities
Interest rate swap liability	$ 1,743	$ 1,865
Other	216	223
Total	11,424	13,034
Pension plan
Other Liabilities
Pension and supplemental executive retirement plan liability	1,845	2,931
SERP
Other Liabilities
Pension and supplemental executive retirement plan liability	$ 7,620	$ 8,015