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Acquisitions (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Business acquisitions
Revenue of CRI from the date of acquisition	$ 17,400,000
Losses of CRI from the date of acquisition	20,200,000
Unaudited pro forma financial information
Revenue	316,957,000	331,923,000
Net income (loss)	$ (70,937,000)	$ 109,286,000
Net income (loss) per share - diluted (in dollars per share)	$ (0.63)	$ 0.88

X

- Definition

This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement.

+ References

No definition available.

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- Definition

Represents the amount of revenue of the acquiree since the acquisition date was included in the consolidated income statement.

+ References

No definition available.

+ Details

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X

- Definition

The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

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- Definition

The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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