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Debt (Schedule Of Obligations Under Debt Arrangements) (Details) - USD ($) $ in Thousands | Sep. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Debt Instrument [Line Items] |  |
Senior secured credit facility | $ 1,014,100 | $ 550,400
Senior unsecured notes | 1,839,933 | 1,050,639
Total long-term debt | 2,854,033 | 1,601,039
7.875% Senior Unsecured Notes [Member] |  |
Debt Instrument [Line Items] |  |
Senior unsecured notes | $ 0 | $ 350,639
Senior unsecured notes, stated rate | 7.875% | 7.875%
Senior unsecured notes, unamortized premium | $ 0 | $ 639
Six Percentage Senior Unsecured Notes [Member] |  |
Debt Instrument [Line Items] |  |
Senior unsecured notes | $ 400,000 | $ 0
Senior unsecured notes, stated rate | 6.00% | 6.00%
Five Point Seventy Five Percentage Senior Unsecured Notes [Member] |  |
Debt Instrument [Line Items] |  |
Senior unsecured notes | $ 350,000 | $ 350,000
Senior unsecured notes, stated rate | 5.75% | 5.75%
Five Point Six Two Five Percentage Senior Unsecured Notes [Member] [Domain] |  |
Debt Instrument [Line Items] |  |
Senior unsecured notes | $ 350,000 | $ 350,000
Senior unsecured notes, stated rate | 5.625% | 5.625%
Six Point Seven Five Percentage Senior Unsecured Notes [Member] |  |
Debt Instrument [Line Items] |  |
Senior unsecured notes | $ 739,933 | $ 0
Senior unsecured notes, stated rate | 6.75% |

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 + Details
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- Definition Carrying amount of collateralized debt obligations with maturities initially due after one year or beyond the operating cycle, if longer, excluding the current portion. Obligations include, but not limited to, mortgage loans, chattel loans, and other borrowings secured by assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 + Details
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