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Stock-Based Compensation - Additional Information (Detail) (USD $)
3 Months Ended 9 Months Ended 1 Months Ended 3 Months Ended 9 Months Ended 1 Months Ended 3 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
Stock Options
Dec. 31, 2013
Restricted Stock and Restricted Stock Units
Dec. 31, 2012
Restricted Stock and Restricted Stock Units
Jun. 30, 2011
Performance Based Restricted Stock and Restricted Stock Units
May 31, 2011
Performance Based Restricted Stock and Restricted Stock Units
Dec. 31, 2013
Performance Based Restricted Stock and Restricted Stock Units
Dec. 31, 2013
Performance Based Restricted Stock and Restricted Stock Units
May 31, 2013
Performance Based Restricted Stock and Restricted Stock Units
Share Based Awards
May 31, 2012
Performance Based Restricted Stock and Restricted Stock Units
Share Based Awards
Dec. 31, 2013
Performance Based Restricted Stock and Restricted Stock Units
Scenario, Previously Reported
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Aggregate intrinsic value of options exercised in period     $ 13,800,000                      
Fair value of options vested in period     2,300,000                      
Unrecognized stock-based compensation expense         4,900,000 10,500,000       4,000,000 4,000,000      
Unrecognized stock-based compensation expense, weighted-average recognition period         2 years 9 months 18 days 1 year 10 months 24 days         1 year 10 months 24 days      
Weighted average grant-date fair value for options granted     $ 9.84 $ 10.07                    
Expected dividend yield     0.00%                      
Weighted average grant-date fair value for restricted stock and restricted stock units granted           $ 23.18 $ 22.32              
Fair value of restricted stock and restricted stock units vested in period           6,000,000 3,000,000              
Shares of award granted           553,000   284,000 284,000     268,988 195,188  
Shares of award granted, performance target met                     234,000      
Shares of award granted, it is not probable that the prescribed performance targets will be met                     50,000      
Stock-based compensation $ 1,648,000 $ 1,936,000 $ 8,367,000 $ 6,899,000           $ 3,000,000 $ 2,800,000     $ 800,000