Long-Term Debt (Schedule Of Long-Term Debt) (Details) - USD ($) |
Sep. 30, 2017 |
Dec. 31, 2016 |
Sep. 30, 2016 |
Jan. 27, 2015 |
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| Debt Instrument [Line Items] | ||||
| Long-term debt, net of unamortized deferred financing costs | $ 472,423,000 | $ 509,878,000 | $ 625,687,000 | |
| Less: current maturities | (34,375,000) | (25,000,000) | (25,000,000) | |
| Long-term debt, less current maturities and net of unamortized deferred financing costs | 438,048,000 | 484,878,000 | 600,687,000 | |
| Credit Agreement 1.25B [Member] | ||||
| Debt Instrument [Line Items] | ||||
| Secured credit | $ 1,250,000,000.00 | |||
| Long-term Debt, Gross | 476,250,000 | 515,000,000 | 631,250,000 | |
| Unamortized deferred financing costs | (3,827,000) | (5,122,000) | (5,563,000) | |
| Credit Agreement 1.25B [Member] | Long-term Debt [Member] | ||||
| Debt Instrument [Line Items] | ||||
| Secured credit | 456,250,000 | 475,000,000 | 481,250,000 | $ 500,000,000 |
| Credit Agreement 1.25B [Member] | Revolving credit facility [Member] | ||||
| Debt Instrument [Line Items] | ||||
| Secured credit | $ 20,000,000 | $ 40,000,000 | $ 150,000,000 |
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount, after accumulated amortization, of debt issuance costs classified as noncurrent. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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