Summary of Other Long Term Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Other Liabilities Noncurrent [Abstract]
Capital lease obligations	$ 8,007	$ 8,111
Accrued pension liabilities	5,711	5,957
Accrued contingent considerations		2,381
Other	2,150	2,264
Total	$ 15,868	$ 18,713