Long Term Debt (Details 1) (USD $)	12 Months Ended	6 Months Ended
Dec. 31, 2011 Bank Credit Facility 2016 2.9%	Jun. 30, 2012 Bank Credit Facility 2016 3.33%	Jun. 30, 2012 Senior Unsecured Debt 2018 8.875%	Dec. 31, 2011 Senior Unsecured Debt 2018 8.875%	Jun. 30, 2012 Senior Unsecured Debt 2022 7.125%
Debt Instrument [Line Items]
Long-term Debt	$ 85,000,000	$ 48,000,000	$ 714,357,000	$ 713,409,000	$ 250,000,000
Variable Interest Rate	2.90%	3.33%
Fixed Interest Rate			8.875%	8.875%	7.175%
Unamortized Discount on Debt			$ 10,600,000	$ 11,600,000

The amount of debt discount (net 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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

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-Section 45

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 21

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 21

-Paragraph 20

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

+ Details

- Definition

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. 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, and after deducting unamortized discount or premiums, if any.

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