Debt (Details 2) - USD ($) $ in Thousands	Sep. 30, 2018		Dec. 31, 2017
Debt Instrument
Total Debt	$ 352,955		$ 383,279
Debt Instrument, Unamortized Debt Issuance Costs, Noncurrent, net	(5,020)		(6,440)
Capital Lease Obligations, Current	1,294	[1]	1,470
Long-Term Portion	316,937		345,956
Current Portion of Long-Term Debt	30,999		30,883
Line of Credit
Debt Instrument
Debt, Current, Net Of Unamortized Debt Issuance Costs	(29,704)	[1]	(29,413)
Current Portion of Long-Term Debt	30,000
Debt Instrument, Unamortized Debt Issuance Costs, Current Portion, net	296
Capital Lease Obligations
Debt Instrument
Total Debt	2,955		3,279
JPMorgan, 2017 Credit Agreement | Line of Credit
Debt Instrument
Total Debt	50,000		80,000
Bonds
Debt Instrument
Total Debt	$ 300,000		$ 300,000

[1] (1) Current maturities of long-term debt include $30,000 of current maturities, less $296 of unamortized debt issuance costs, under our 2017 Credit Agreement and $1,294 of current maturities of capital lease obligations.