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Long-Term Debt (Narrative) (Details) (USD $)
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3 Months Ended | 3 Months Ended | 3 Months Ended | 0 Months Ended | 4 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Mar. 31, 2012
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Mar. 31, 2011
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Dec. 31, 2011
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Mar. 31, 2012
Secured Credit Agreement Expiring July 25, 2013 [Member]
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Mar. 31, 2011
Secured Credit Agreement Expiring July 25, 2013 [Member]
Y
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Mar. 31, 2012
Secured Credit Agreement Expiring July 25, 2013 [Member]
Revolving Credit Facility [Member]
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Mar. 31, 2011
Secured Credit Agreement Expiring July 25, 2013 [Member]
Revolving Credit Facility [Member]
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Mar. 31, 2011
Secured Credit Agreement Expiring July 25, 2013 [Member]
Term Loan [Member]
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Mar. 31, 2012
11.25% Senior Notes Due August 1, 2016 [Member]
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Mar. 31, 2011
11.25% Senior Notes Due August 1, 2016 [Member]
Y
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Dec. 31, 2011
11.25% Senior Notes Due August 1, 2016 [Member]
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Apr. 24, 2012
Secured Credit Agreement Expiring April 23, 2017 [Member]
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Apr. 24, 2012
Secured Credit Agreement Expiring April 23, 2017 [Member]
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Apr. 23, 2012
Secured Credit Agreement Expiring April 23, 2017 [Member]
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Apr. 24, 2012
Secured Credit Agreement Expiring April 23, 2017 [Member]
Revolving Credit Facility [Member]
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| Debt Instrument [Line Items] | |||||||||||||||
| Term loan | $ 69,841,000 | $ 69,841,000 | $ 150,000,000 | $ 250,000,000 | $ 250,000,000 | ||||||||||
| Revolving credit facility | 150,000,000 | 600,000,000 | 600,000,000 | 350,000,000 | |||||||||||
| Maximum leverage ratio, required | 2.75 | 3.00 | |||||||||||||
| Minimum interest coverage ratio, required | 3.00 | 3.00 | |||||||||||||
| Actual leverage ratio | 0.80 | ||||||||||||||
| Actual interest coverage ratio | 10.77 | ||||||||||||||
| Outstanding commercial and standby letters of credit issued under revolving credit facility | 25,700,000 | ||||||||||||||
| Remaining borrowing capacity under revolving credit facility | 124,300,000 | ||||||||||||||
| Annual fee on revolving credit facility portion of credit agreement | 0.50% | ||||||||||||||
| Senior notes due 2016 | 240,000,000 | 240,000,000 | 240,000,000 | 240,000,000 | 240,000,000 | 240,000,000 | |||||||||
| Subordinated borrowing, interest rate | 11.25% | ||||||||||||||
| Unamortized discount of Senior Notes | 840,000 | 1,035,000 | 889,000 | 1,600,000 | |||||||||||
| Other issuance expenses | 7,300,000 | 7,300,000 | |||||||||||||
| Terms of debt, years | 5 | 8 | 5 | 5 | |||||||||||
| Prepayment of remaining balance of term loan | $ 69,800,000 | ||||||||||||||