Long-Term Debt, Interest Rate Swap and Capitalized Lease Obligations (Scheduled Payments of Capital Lease Obligations) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Debt Disclosure [Abstract]
2013	$ 866,000
2014	575,000
2015	47,000
2016	47,000
2017	27,000
Total	1,562,000
Amounts related to interest	(91,000)
Principal payments on capitalized lease obligation	$ 1,471,000

Amount of minimum lease payments for capital leases.

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-Name Accounting Standards Codification

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Amount of minimum lease payments maturing in the next fiscal year following the latest fiscal year for capital leases.

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Amount of minimum lease payments maturing in the fifth fiscal year following the latest fiscal year for capital leases.

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Amount of minimum lease payments maturing in the forth fiscal year following the latest fiscal year for capital leases.

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Amount of minimum lease payments maturing in the third fiscal year following the latest fiscal year for capital leases.

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Amount of minimum lease payments maturing in the second fiscal year following the latest fiscal year for capital leases.

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Amount necessary to reduce net minimum lease payments to present value for capital leases.

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-Name Statement of Financial Accounting Standard (FAS)

-Number 13

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

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Present value of minimum lease payments for capital leases net of executory costs, including amounts paid by the lessee to the lessor for insurance, maintenance and taxes.

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