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Long-Term Debt (Tables)
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9 Months Ended | ||||||||||||||||||
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Sep. 30, 2012
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| Debt Disclosure [Abstract] | |||||||||||||||||||
| Schedule of Debt Instrument, Redemption Price, 6.50% Senior Notes Due 2023 [Table Text Block] | On or after July 1, 2017, the Company may also redeem all or, from time to time, a portion of the 2023 Notes at the redemption prices set forth below, during the twelve-month period beginning on July 1 of each applicable year, expressed as a percentage of the principal amount redeemed, plus accrued and unpaid interest:
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