Other Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Other Liabilities
Interest rate swap liability	$ 5,634	$ 2,905
Other	203	84
Total	16,431	13,251
Pension plan
Other Liabilities
Pension and supplemental executive retirement plan liability	2,488	2,263
SERP
Other Liabilities
Pension and supplemental executive retirement plan liability	$ 8,106	$ 7,999