Summary of Other Long Term Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Other Liabilities Noncurrent [Abstract]
Capital lease obligations	$ 9,173	$ 9,507
Accrued pension liabilities	3,693	6,037
Accrued contingent considerations	3,889
Other	2,690	3,275
Total	$ 19,445	$ 18,819