Acquisitions - Schedule of Contingent Consideration - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	May 01, 2018
Business Acquisition [Line Items]
2018	$ 8,081
2019	7,500
2020	4,000
Total	19,581
Beginning Liability	4,225
Additions	905
Payments	0
Change in Fair Value of Contingent Consideration	(3,446)
Contingent Consideration Foreign Currency Translation	(12)
Ending Liability	1,672
IC Axon
Business Acquisition [Line Items]
2018	0
2019	3,500
2020	0
Total	3,500	$ 3,500
Beginning Liability	0
Additions	905
Payments	0
Change in Fair Value of Contingent Consideration	0
Contingent Consideration Foreign Currency Translation	0
Ending Liability	905
CLS
Business Acquisition [Line Items]
2018	2,179
2019	0
2020	0
Total	2,179
Beginning Liability	669
Additions	0
Payments	0
Change in Fair Value of Contingent Consideration	(422)
Contingent Consideration Foreign Currency Translation	(12)
Ending Liability	235
Maverick
Business Acquisition [Line Items]
2018	5,902
2019	0
2020	0
Total	5,902
Beginning Liability	1,979
Additions	0
Payments	0
Change in Fair Value of Contingent Consideration	(1,704)
Contingent Consideration Foreign Currency Translation	0
Ending Liability	275
McKinney Rogers
Business Acquisition [Line Items]
2018	0
2019	4,000
2020	4,000
Total	8,000
Beginning Liability	1,501
Additions	0
Payments	0
Change in Fair Value of Contingent Consideration	(1,244)
Contingent Consideration Foreign Currency Translation	0
Ending Liability	257
Emantras
Business Acquisition [Line Items]
Beginning Liability	76
Additions	0
Payments	0
Change in Fair Value of Contingent Consideration	(76)
Contingent Consideration Foreign Currency Translation	0
Ending Liability	0
Minimum | IC Axon
Business Acquisition [Line Items]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low	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 | IC Axon
Business Acquisition [Line Items]
Total	3,500
Maximum | CLS
Business Acquisition [Line Items]
Total	2,179
Maximum | Maverick
Business Acquisition [Line Items]
Total	10,000
Maximum | McKinney Rogers
Business Acquisition [Line Items]
Total	$ 18,000