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Stock Based Compensation (Option activity for company's stock incentive plans) (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended
Sep. 30, 2012
Share Based Compensation Arrangements By Share Based Payment Award Options [Line Items]  
Number of Shares, Beginning Balance 3,347,445
Number of Shares, Granted   
Number of Shares, Exercised (29,705)
Number of Shares, Forfeitures and Cancellations (11,803)
Number of Shares, Ending Balance 3,305,937
Number of Shares, Vested and expected to vest, Ending Balance 3,274,056
Number of Shares, Vested and exercisable, Ending Balance 2,563,713
Options outstanding, Weighted Average Exercise Price, Beginning Balance $ 1.45
Options, Granted, Weighted Average Exercise Price   
Options, Exercised, Weighted Average Exercise Price $ 3.42
Options, Forfeitures and Cancellations, Weighted Average Exercise Price $ 5.53
Options outstanding, Weighted Average Exercise Price, Ending Balance $ 1.42
Options, Weighted Average Exercise Price, Vested and expected to vest, Ending Balance $ 1.39
Options, Weighted Average Exercise Price, Vested and exercisable, Ending Balance $ 0.63
Options outstanding, Weighted Average Remaining Contractual Term, Ending Balance 6 years 4 months 2 days
Options, Remaining Contractual Term, Vested and expected to vest, Ending Balance 6 years 3 months 26 days
Options, Weighted Average Remaining Contractual Term, Vested and exercisable, Ending Balance 5 years 9 months 29 days
Options outstanding, Intrinsic Value, Ending Balance $ 34,809
Options, Aggregate Intrinsic Value, Vested and expected to vest, Ending Balance 34,570
Options, Aggregate Intrinsic Value, Vested and exercisable, Ending Balance $ 28,903