Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Long-term liabilities:
Pension and post-retirement benefit plans, long-term portion	$ 9,903	$ 11,440
Long-term income tax payable	896	1,237
Deferred rent	881	1,043
Long-term deferred tax liability		559
Long-term deferred compensation	347	359
Other liabilities	$ 12,027	$ 14,638