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Debt (Schedule of Long-Term Debt) (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Debt Instrument [Line Items] |  |
Total debt | $ 396,871 | $ 396,269
Unamortized debt premium | 1,989 | 2,395
Debt issuance cost | (5,324) | (6,425)
Less: current maturities | (124) | (253)
Long-term debt | 396,747 | 396,016
Senior unsecured notes due October 2021 |  |
Debt Instrument [Line Items] |  |
Total debt | 400,000 | 400,000
Senior secured revolving credit facility |  |
Debt Instrument [Line Items] |  |
Total debt | 0 | 0
Other debt |  |
Debt Instrument [Line Items] |  |
Total debt | $ 206 | $ 299

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- Definition Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13,16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Amount, after accumulated amortization, of debt premium. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 + Details
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