Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Intangible Assets
Intangible amortization expense	$ 1,149	$ 1,164
Intangible assets subject to amortization, Cost	66,376		$ 66,376
Intangible assets subject to amortization, Accumulated Amortization	(36,723)		(35,574)
Intangible assets subject to amortization, Net Book Value	$ 29,653		30,802
Customer relationships
Intangible Assets
Weighted Average Life	17 years 2 months 12 days
Intangible assets subject to amortization, Cost	$ 55,454		55,454
Intangible assets subject to amortization, Accumulated Amortization	(29,684)		(28,865)
Intangible assets subject to amortization, Net Book Value	$ 25,770		26,589
Technology and software
Intangible Assets
Weighted Average Life	8 years
Intangible assets subject to amortization, Cost	$ 7,101		7,101
Intangible assets subject to amortization, Accumulated Amortization	(5,184)		(4,952)
Intangible assets subject to amortization, Net Book Value	$ 1,917		2,149
Trademarks
Intangible Assets
Weighted Average Life	8 years 8 months 12 days
Intangible assets subject to amortization, Cost	$ 3,330		3,330
Intangible assets subject to amortization, Accumulated Amortization	(1,364)		(1,266)
Intangible assets subject to amortization, Net Book Value	$ 1,966		2,064
Non-compete agreements
Intangible Assets
Weighted Average Life	5 years
Intangible assets subject to amortization, Cost	$ 491		491
Intangible assets subject to amortization, Accumulated Amortization	$ (491)		$ (491)