SENIOR AND CONVERTIBLE SENIOR NOTES - Schedule of Senior and Convertible Senior Notes (Parenthetical) (Details) - Senior Notes [Member] - USD ($) $ in Thousands |
Dec. 31, 2015 |
Jun. 02, 2015 |
Dec. 31, 2014 |
Mar. 31, 2013 |
Sep. 30, 2012 |
Apr. 30, 2012 |
Dec. 31, 2010 |
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4.50% senior notes due 2018 [Member] | |||||||
Debt Instrument [Line Items] | |||||||
Debt instrument, stated rate | 4.50% | 4.50% | 4.50% | ||||
7.15% senior notes due 2020 [Member] | |||||||
Debt Instrument [Line Items] | |||||||
Debt instrument, stated rate | 7.15% | 7.15% | 7.15% | ||||
Unamortized premium | $ 2,418 | $ 2,986 | |||||
7.00% senior notes due 2022 [Member] | |||||||
Debt Instrument [Line Items] | |||||||
Debt instrument, stated rate | 7.00% | 7.00% | 7.00% | ||||
6.00% senior notes due 2025 [Member] | |||||||
Debt Instrument [Line Items] | |||||||
Debt instrument, stated rate | 6.00% | 6.00% | 6.00% | ||||
1.875% convertible senior notes due 2032 [Member] | |||||||
Debt Instrument [Line Items] | |||||||
Debt instrument, stated rate | 1.875% | 1.875% | 1.875% |
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. 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 The amount of debt premium that was originally recognized at the issuance of the instrument that has yet to be amortized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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