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Acquisition (Details) (USD $) | 3 Months Ended |  | 1 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2010 | Jun. 03, 2011 | Jun. 30, 2011 CRI | Jun. 03, 2011 CRI
Acquisition |  |  |  |
Cash deposited into an escrow account until December 2012 |  | $ 15,000,000 |  |
Shares deposited into an escrow account until December 2012 (in shares) |  | 1,300,000 |  |
Cash or the company's common stock payable to certain CRI employees and contractors as (the Retention Bonus) |  | 50,000,000 |  |
Period over which retention bonus is payable (in years) |  | 3 |  |
Number of installments for payment of retention bonus |  | 3 |  |
Approximate installment amount of retention bonus |  | 16,700,000 |  |
Number of payments that will be made in either cash or shares of the company's common stock, at the company's option |  | 2 |  |
Related transaction costs |  | 3,800,000 |  |
Consideration paid by the company |  |  |  |
Cash |  | 168,805,000 |  |
Common Stock (in dollars per share) |  | 88,438,000 |  |
Purchase price paid (in shares) | 6,380,806 |  | 6,400,000 |
Issue price of shares (in dollars per shares) |  | $ 13.86 |  |
Total |  | 257,243,000 |  | 257,200,000
Business acquisitions |  |  |  |
Total |  | $ 257,243,000 |  | $ 257,200,000
Purchase price paid (in shares) | 6,380,806 |  | 6,400,000 |

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