Intangible Assets - Components of Gross and Net Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 261,623	$ 261,788
Accumulated Impairment	(9,463)	(9,455)
Accumulated Amortization	(148,176)	(137,534)
Net Book Value	103,984	114,799
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	108,377	108,400
Accumulated Impairment	(6,035)	(6,035)
Accumulated Amortization	(58,826)	(55,408)
Net Book Value	43,516	46,957
Customer related
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	90,177	90,351
Accumulated Impairment	(50)	(50)
Accumulated Amortization	(44,628)	(40,527)
Net Book Value	45,499	49,774
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	45,901	45,874
Accumulated Impairment	(3,245)	(3,237)
Accumulated Amortization	(28,316)	(25,355)
Net Book Value	14,340	17,282
Internally developed software
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	13,281	13,281
Accumulated Impairment	0	0
Accumulated Amortization	(12,743)	(12,606)
Net Book Value	538	675
Patents
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,697	2,692
Accumulated Impairment	(133)	(133)
Accumulated Amortization	(2,564)	(2,559)
Net Book Value	0	0
Service agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,190	1,190
Accumulated Impairment	0	0
Accumulated Amortization	(1,099)	(1,079)
Net Book Value	$ 91	$ 111