Other Intangible, Net and Goodwill (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
Goodwill and Intangible Assets Disclosure [Abstract]
Change In Gross Amount of Identifiable Intangible Assets			$ 0
Finite-Lived Intangible Assets, Amortization Expense	$ 600	$ 800	1,900	$ 1,800
Finite-Lived Intangible Assets [Line Items]
Carrying amount of goodwill	132,410		132,410		$ 132,410
Goodwill, Period Increase (Decrease)			0
Gross Amount	25,900		25,900
Accumulated Amortization	10,804		10,804
Net Intangible Assets	15,096		$ 15,096
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Amortization period (years)			20 years
Gross Amount	13,600		$ 13,600
Accumulated Amortization	2,158		2,158
Net Intangible Assets	11,442		11,442
Tradename
Finite-Lived Intangible Assets [Line Items]
Gross Amount	8,100		8,100
Accumulated Amortization	6,712		6,712
Net Intangible Assets	1,388		1,388
Covenants Not to Compete
Finite-Lived Intangible Assets [Line Items]
Gross Amount	4,200		4,200
Accumulated Amortization	1,934		1,934
Net Intangible Assets	$ 2,266		$ 2,266
Maximum [Member] | Tradename
Finite-Lived Intangible Assets [Line Items]
Amortization period (years)			6 years
Maximum [Member] | Covenants Not to Compete
Finite-Lived Intangible Assets [Line Items]
Amortization period (years)			10 years
Minimum [Member] | Tradename
Finite-Lived Intangible Assets [Line Items]
Amortization period (years)			6 months
Minimum [Member] | Covenants Not to Compete
Finite-Lived Intangible Assets [Line Items]
Amortization period (years)			1 year