Goodwill and Other Intangible Assets - Summary of Other Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets, Net [Abstract]
Amortized intangible assets, Gross Carrying Value	$ 93,641	$ 91,477
Accumulated Amortization	(31,320)	(18,264)
Amortized intangible assets, Net Carrying Value	62,321	73,213
Intangible Assets, Gross (Excluding Goodwill)	94,101	91,937
Other intangible assets, net	62,781	73,673
Customer contracts and relationships
Finite-Lived Intangible Assets, Net [Abstract]
Amortized intangible assets, Gross Carrying Value	68,798	67,762
Accumulated Amortization	(23,696)	(14,345)
Amortized intangible assets, Net Carrying Value	45,102	53,417
Operating contracts and licenses
Finite-Lived Intangible Assets, Net [Abstract]
Amortized intangible assets, Gross Carrying Value	9,951	9,315
Accumulated Amortization	(1,094)	(652)
Amortized intangible assets, Net Carrying Value	8,857	8,663
Tradenames
Finite-Lived Intangible Assets, Net [Abstract]
Amortized intangible assets, Gross Carrying Value	8,633	8,324
Accumulated Amortization	(2,873)	(1,440)
Amortized intangible assets, Net Carrying Value	5,760	6,884
Non-compete agreements
Finite-Lived Intangible Assets, Net [Abstract]
Amortized intangible assets, Gross Carrying Value	5,363	5,190
Accumulated Amortization	(3,007)	(1,369)
Amortized intangible assets, Net Carrying Value	2,356	3,821
Other
Finite-Lived Intangible Assets, Net [Abstract]
Amortized intangible assets, Gross Carrying Value	896	886
Accumulated Amortization	(650)	(458)
Amortized intangible assets, Net Carrying Value	246	428
Business licenses
Finite-Lived Intangible Assets, Net [Abstract]
Unamortized intangible assets, Gross Carrying Value	$ 460	$ 460