Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 242,273	$ 244,647
Indefinite-lived other intangible asset	4,309	4,525
Total other intangible assets, gross carrying amount	246,582	249,172
Accumulated Amortization	83,643	72,164
Net Carrying Amount	158,630	172,483
Total other intangible assets, net carrying amount	162,939	177,008
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	148,800	149,753
Accumulated Amortization	36,413	30,078
Net Carrying Amount	112,387	119,675
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	80,163	81,535
Accumulated Amortization	42,736	38,624
Net Carrying Amount	37,427	42,911
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,970	12,019
Accumulated Amortization	4,053	3,213
Net Carrying Amount	7,917	8,806
Covenants not to compete
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,340	1,340
Accumulated Amortization	441	249
Net Carrying Amount	$ 899	$ 1,091