Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Intangible asset useful life	124 months
Finite lived intangible assets	$ 38,427	$ 47,813
Amortization of intangible assets	$ 9,400	11,600	$ 9,800
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset useful life	160 months
Finite lived intangible assets	$ 24,168	28,335
Accumulated amortization	$ 12,715	8,548
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset useful life	89 months
Finite lived intangible assets	$ 9,074	9,919
Accumulated amortization	$ 2,498	1,653
Computer Software [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset useful life	14 months
Finite lived intangible assets	$ 4,958	9,296
Accumulated amortization	$ 10,013	5,675
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset useful life	77 months
Finite lived intangible assets	$ 227	263
Accumulated amortization	$ 127	$ 91