Acquisitions (Details 1) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
Business Acquisition [Line Items]
2017	$ 8,214
2018	4,000
2020	4,000
Total	16,214
Beginning Liability	4,225
Additions	0
Payments	0
Change in Fair Value of Contingent Consideration	(2,552)
Foreign Currency Translation	26
Ending Liability	1,699
CLS
Business Acquisition [Line Items]
2017	2,312
2018	0
2020	0
Total	2,312
Beginning Liability	669
Additions	0
Payments	0
Change in Fair Value of Contingent Consideration	17
Foreign Currency Translation	26
Ending Liability	712
Maverick
Business Acquisition [Line Items]
2017	5,902
2018	0
2020	0
Total	5,902
Beginning Liability	1,979
Additions	0
Payments	0
Change in Fair Value of Contingent Consideration	(1,325)
Foreign Currency Translation	0
Ending Liability	654
McKinney Rogers
Business Acquisition [Line Items]
2017	0
2018	4,000
2020	4,000
Total	8,000
Beginning Liability	1,501
Additions	0
Payments	0
Change in Fair Value of Contingent Consideration	(1,168)
Foreign Currency Translation	0
Ending Liability	333
Emantras
Business Acquisition [Line Items]
Beginning Liability	76
Additions	0
Payments	0
Change in Fair Value of Contingent Consideration	(76)
Foreign Currency Translation	0
Ending Liability	0
Minimum | CLS
Business Acquisition [Line Items]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low	0
Minimum | Maverick
Business Acquisition [Line Items]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low	0
Minimum | McKinney Rogers
Business Acquisition [Line Items]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low	0
Maximum | CLS
Business Acquisition [Line Items]
Total	2,312
Maximum | Maverick
Business Acquisition [Line Items]
Total	10,000
Maximum | McKinney Rogers
Business Acquisition [Line Items]
Total	$ 18,000