Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Sep. 30, 2018	Oct. 12, 2017
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 2,376	$ 1,085
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
Finite-Lived Intangible Assets, Gross	93,860	87,664
Intangible assets, net of accumulated amortization of $10,594 and $8,218, respectively	83,266	79,446
Finite-Lived Intangible Assets, Amortization Expense, Next Rolling Twelve Months	1,767
Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Two	1,493
Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Three	1,358
Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Four	1,126
Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Five	526
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	5,303
Finite-Lived Intangible Assets, Gross	8,914	3,611
Contract-Based Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	0	$ 0
Noncompete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			$ 266
Finite-Lived Intangible Assets, Gross	$ 266
Trademarks and Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets			$ 627