Summary of Other Long Term Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Other Liabilities Noncurrent [Abstract]
Capital lease obligations	$ 8,396	$ 9,173
Accrued pension liabilities	2,332	3,693
Accrued contingent considerations	1,495	3,889
Other	2,258	2,690
Total	$ 14,481	$ 19,445