Long-term Debt - Debt Table (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Debt		$ 374,650	$ 419,630
Debt issuance costs		(4,720)	(6,050)
Current maturities, debt		13,810	13,850
Long-term debt, net		$ 360,840	405,780
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate, LIBOR plus	[1],[2]	1.75%
Credit Agreement [Member]
Debt Instrument [Line Items]
Interest rate, LIBOR plus	[1],[2]	1.75%
Debt		$ 333,720	371,820
Receivables Facility and other [Member] [Member]
Debt Instrument [Line Items]
Debt		$ 45,650	$ 53,860
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date		Jun. 30, 2020
Line of Credit Facility, Maximum Borrowing Capacity		$ 500,000
Senior Secured Term Loan A [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date		Jun. 30, 2020
Debt Instrument, Face Amount		$ 275,000

[1] London Interbank Offered Rate ("LIBOR")

[2] The interest rate spread is based on the leverage ratio, as defined, as of the most recent determination date.