Other Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Other Liabilities
Interest rate swap liability	$ 6,212	$ 2,905
Other	169	84
Total	16,843	13,251
Pension plan
Other Liabilities
Pension and supplemental executive retirement plan liability	2,413	2,263
SERP
Other Liabilities
Pension and supplemental executive retirement plan liability	$ 8,049	$ 7,999