Intangible Assets and Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Jul. 06, 2017
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 132,410	$ 100,212	$ 32,198
Finite-Lived Intangible Assets, Gross	25,900	18,100
Finite-Lived Intangible Assets, Accumulated Amortization	8,878	6,010
Finite-Lived Intangible Assets, Net	17,022	12,090
Finite-Lived Intangible Assets, Amortization Expense	2,868	$ 1,923
Finite-Lived Intangible Assets, Amortization Expense, Next Rolling Twelve Months	2,500
Finite-Lived Intangible Assets, Amortization Expense, Year Two	2,200
Finite-Lived Intangible Assets, Amortization Expense, Year Three	1,200
Finite-Lived Intangible Assets, Amortization Expense, Year Four	1,200
Finite-Lived Intangible Assets, Amortization Expense, Year Five	$ 1,100
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	20 years	20 years
Finite-Lived Intangible Assets, Gross	$ 13,600	$ 7,600
Finite-Lived Intangible Assets, Accumulated Amortization	1,645	1,187
Finite-Lived Intangible Assets, Net	11,955	$ 6,413
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life		10 years
Finite-Lived Intangible Assets, Gross	4,200	$ 3,100
Finite-Lived Intangible Assets, Accumulated Amortization	1,464	969
Finite-Lived Intangible Assets, Net	2,736	$ 2,131
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life		6 years
Finite-Lived Intangible Assets, Gross	8,100	$ 7,400
Finite-Lived Intangible Assets, Accumulated Amortization	5,769	3,854
Finite-Lived Intangible Assets, Net	$ 2,331	$ 3,546
Minimum [Member] | Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year
Minimum [Member] | Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	6 months
Maximum [Member] | Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years
Maximum [Member] | Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	6 years