Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Oct. 12, 2017
Finite-Lived Intangible Assets [Line Items]
Other Intangible Assets, Net						$ 6,200
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles						5,569
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets						$ 627
Intangible assets, net of accumulated amortization of $10,070 and $8,218, respectively	$ 83,790		$ 83,790		$ 79,446
Finite-Lived Intangible Assets, Gross	93,860		93,860		87,664
Amortization of Intangible Assets	1,339	$ 269	1,848	$ 815
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	5,303		5,303
Finite-Lived Intangible Assets, Gross	8,914		8,914		3,611
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	266		$ 266
Finite-Lived Intangible Asset, Useful Life			18 years
Finite-Lived Intangible Assets, Gross	266		$ 266
Contract-Based Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life			9 years
Finite-Lived Intangible Assets, Gross	0		$ 0		$ 0
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life			7 years
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life			15 years
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	$ 627		$ 627