Intangible Assets and Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 132,410	$ 132,410	$ 100,212
Goodwill, Acquired During Period	0	32,198
Finite-Lived Intangible Assets, Gross	25,900	25,900
Finite-Lived Intangible Assets, Accumulated Amortization	11,406	8,878
Finite-Lived Intangible Assets, Net	14,494	17,022
Finite-Lived Intangible Assets, Amortization Expense	2,500	$ 2,900
Finite-Lived Intangible Assets, Amortization Expense, Next Rolling Twelve Months	2,300
Finite-Lived Intangible Assets, Amortization Expense, Year Two	1,200
Finite-Lived Intangible Assets, Amortization Expense, Year Three	1,200
Finite-Lived Intangible Assets, Amortization Expense, Year Four	1,100
Finite-Lived Intangible Assets, Amortization Expense, Year Five	$ 1,000
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	$ 13,600
Finite-Lived Intangible Assets, Accumulated Amortization	2,329	1,645
Finite-Lived Intangible Assets, Net	11,271	11,955
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	8,100	8,100
Finite-Lived Intangible Assets, Accumulated Amortization	7,021	5,769
Finite-Lived Intangible Assets, Net	1,079	2,331
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	4,200	4,200
Finite-Lived Intangible Assets, Accumulated Amortization	2,056	1,464
Finite-Lived Intangible Assets, Net	$ 2,144	$ 2,736
Minimum [Member] | Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	6 months	6 months
Minimum [Member] | Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year	1 year
Maximum [Member] | Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	6 years	6 years
Maximum [Member] | Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years	10 years