Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived intangible assets, gross carrying amount	$ 53,919	$ 59,887
Finite-lived intangible assets, accumulated amortization	(24,750)	(35,245)
Finite-lived intangible assets, net	29,169	24,642
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]
Indefinite-lived intangible assets	508	518
Total intangible assets, gross carrying amount	54,427	60,405
Total intangible assets, net	29,677	25,160
Permits and licenses [Member]
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]
Indefinite-lived intangible assets	508	518
Technology-based intangible assets [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived intangible assets, gross carrying amount	20,222	17,380
Finite-lived intangible assets, accumulated amortization	(6,516)	(5,509)
Finite-lived intangible assets, net	13,706	11,871
Customer-related intangible assets [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived intangible assets, gross carrying amount	33,697	40,662
Finite-lived intangible assets, accumulated amortization	(18,234)	(27,891)
Finite-lived intangible assets, net	15,463	12,771
Employment related intangible assets [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived intangible assets, gross carrying amount	0	1,845
Finite-lived intangible assets, accumulated amortization	0	(1,845)
Finite-lived intangible assets, net	$ 0	$ 0