Goodwill and Intangible Assets Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Intangible Amortization Expense, Next Twelve Months	$ 1,000
Intangible Amortization Expense, Year Two	1,000
Intangible Amortization Expense, Year Three	1,000
Intangible Amortization Expense, Year Four	1,000
Intangible Amortization Expense, Year Five	1,000
Customer relationships, Accumulated amortization	(2,399)	$ (1,484)
Intangible assets [Abstract]
Intangible Assets, Gross (Excluding Goodwill)	19,250	16,550
Intangible Assets, Net (Excluding Goodwill)	16,851	15,066
Trade names and trademarks [Member]
Indefinite-lived Intangible Assets [Line Items]
Trade names and trademarks, Gross carrying amount	$ 8,900	8,900
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	11 years
Finite-Lived Intangible Assets, Gross	$ 10,350	7,650
Customer relationships, Accumulated amortization	(2,399)	(1,484)
Finite-Lived Intangible Assets, Net	$ 7,951	$ 6,166