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SUBSEQUENT EVENTS (Details) (USD $)
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12 Months Ended | 2 Months Ended | |||
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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Feb. 29, 2012
Issuance of Senior Notes [Member]
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Feb. 02, 2012
Issuance of Senior Notes [Member]
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| Subsequent Event [Line Items] | |||||
| Description of Use of Proceeds | repay the outstanding principal amount of the 7.75% senior notes due February 15, 2012 | ||||
| Payment from Termination of Interest Rate Swaps | $ 33,433,000 | $ 0 | $ 0 | $ 25,400,000 | |
| Payment Terms | The interest on the 4.75% senior notes is payable semi-annually in arrears on February 1 and August 1 | ||||
| Date of First Required Interest Payment | August 1, 2012 | ||||
| Date Issued | February 2, 2012 | ||||
| Face value | 250,000,000 | ||||
| Stated interest rate | 4.75% | ||||
| Proceeds from senior note offering, net of issuance costs | $ 0 | $ 445,431,000 | $ 0 | $ 247,500,000 | |
| Maturity Date | Feb. 01, 2022 | ||||
| X | ||||||||||
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- Definition
Description of the use of proceeds from the debt issuance. No definition available.
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- Definition
Proceeds from the termination of interest rate swap agreements. No definition available.
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- Definition
Date that the debt agreement requires the first payment to be made, which may be presented in a variety of ways (year, month and year, day, month and year, quarter, etc.). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Interest rate stated in the contractual debt agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Date when the debt instrument was issued, which may be presented in a variety of ways (year, month and year, day, month and year, quarter, etc.). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Date when the debt instrument is scheduled to be fully repaid, which may be presented in a variety of ways (year, month and year, day, month and year, quarter, etc.). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Description of the payment terms of the debt instrument (for example, whether periodic payments include principal and frequency of payments) and discussion about any contingencies associated with the payment. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The cash inflow from other long-term borrowings not otherwise defined in the taxonomy (with maturities initially due beyond one year or the normal operating cycle of the entity, if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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