Including the current and noncurrent portions, carrying amount of debt identified as being convertible into another form of financial instrument (typically the entity's common stock) as of the balance sheet date, which originally required full repayment more than twelve months after issuance or greater than the normal operating cycle of the company.

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- Definition

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.

+ References

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

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-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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Carrying amount of long-term debt, net of unamortized discount or premium, scheduled 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.

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Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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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.

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-Publisher SEC

-Name Regulation S-X (SX)

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Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

+ References

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Debt Obligations (Table 1) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Debt Instrument [Line Items]
Secured Debt	$ 115,163	$ 0
Long-term Debt, Gross	874,192	469,884
Debt Instrument, Unamortized Discount	(14,686)	(2,506)
Long-term Debt, Current Maturities	(15,713)	(12,350)
Long-term debt	843,793	455,028
[StandbyLettersOfCreditMember]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount	0	31,724
[FifteenPercentFixedRateDueTwoThousandAndThirteenMember]
Debt Instrument [Line Items]
Secured Debt	0	240,349
[TwelvePercentFixedRateDueTwoThousandAndFourteenMember]
Debt Instrument [Line Items]
Subordinated Debt	0	32,012	50,000
[ElevenPointFivePercentUntilMarchThirtyFirstTwoThousandAndFourteenAndSevenPointFivePercentThereafterDueTwoThousandAndSixteenMember]
Debt Instrument [Line Items]
Convertible Debt	70,029	62,523
[TwelvePercentFixedRateDueTwoThousandAndEighteenMember]
Debt Instrument [Line Items]
Secured Debt	554,000	0
[FivePointFivePercentFixedRateDueTwoThousandAndSixteenMember]
Debt Instrument [Line Items]
Convertible Debt	$ 135,000	$ 135,000