Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 244,104	$ 244,647
Indefinite-lived other intangible asset	4,488	4,525
Total other intangible assets, gross carrying amount	248,592	249,172
Accumulated Amortization	80,607	72,164
Net Carrying Amount	163,497	172,483
Total other intangible assets, net carrying amount	167,985	177,008
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	149,496	149,753
Accumulated Amortization	34,508	30,078
Net Carrying Amount	114,988	119,675
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	81,273	81,535
Accumulated Amortization	41,943	38,624
Net Carrying Amount	39,330	42,911
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,995	12,019
Accumulated Amortization	3,779	3,213
Net Carrying Amount	8,216	8,806
Covenants not to compete
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,340	1,340
Accumulated Amortization	377	249
Net Carrying Amount	$ 963	$ 1,091