Other Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	$ 76,177	$ 78,032
Less accumulated amortization	(44,639)	(40,317)
Intangible assets, net	31,538	37,715
Customer lists
Acquired Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	$ 72,667	73,759
Weighted Average Life	13 years 6 months
Non-competition agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	$ 943	988
Weighted Average Life	4 years 1 month
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	$ 2,510	3,228
Weighted Average Life	9 years
Patents
Acquired Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	$ 57	$ 57
Weighted Average Life	13 years 4 months