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Subsequent Events (Details Textual) (USD $)
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6 Months Ended | 6 Months Ended | 3 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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Jun. 30, 2012
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Jun. 30, 2012
Maximum [Member]
Rate
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Jun. 30, 2012
Minimum [Member]
Rate
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Jun. 30, 2012
Senior Subordinated Notes [Member]
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Jul. 02, 2012
Senior Subordinated Notes [Member]
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Oct. 23, 2012
5.0 % Convertible Notes [Member]
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Jul. 02, 2012
5.0 % Convertible Notes [Member]
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Jun. 30, 2012
Exchange Offer for 5.0% Convertible Notes [Member]
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Jun. 25, 2012
Exchange Offer for 5.0% Convertible Notes [Member]
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Jun. 25, 2012
Exchange Offer for 5.0% Convertible Notes [Member]
Maximum [Member]
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Jun. 25, 2012
Exchange Offer for 5.0% Convertible Notes [Member]
Minimum [Member]
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| Subsequent Events (Textual) [Abstract] | |||||||||||
| Aggregate principal amount | $ 200,000,000 | $ 80,000,000 | $ 1,000 | ||||||||
| Notes maturity date | Jul. 15, 2022 | ||||||||||
| Notes issued at a price of principal amount | 99.11% | ||||||||||
| Notes issued yield maturity, percentage | 7.125% | ||||||||||
| Interest on notes | 10.52% | 9.52% | 7.00% | 5.00% | |||||||
| Date of first required payment | Jan. 15, 2013 | ||||||||||
| Interest payable description | Semi-annually in arrears on January 15 and July 15 of each year | ||||||||||
| Percentage of notes redeemable under special mandatory redemption | 100.00% | ||||||||||
| Notes redeemed percentage of aggregate principal amount | 35.00% | ||||||||||
| Notes redemption price percentage of the par value | 107.00% | ||||||||||
| Notes redemption price percentage of the par value due to change of control | 101.00% | ||||||||||
| Debt instrument maximum allowed dividends per share | $ 0.10 | ||||||||||
| Outstanding principal amount of the 7.0% Notes | 25.00% | ||||||||||
| Indebtedness with outstanding balance | 35,000,000 | ||||||||||
| Total value of offer consideration for $ 1,000 principal amount | 1,631 | 1,000 | |||||||||
| Exchange offer expires | 12:00 midnight New York City time at the end of July 27, 2012 | ||||||||||
| Additional stock authorized used in the repurchase program | $ 100,000,000 | ||||||||||