XML 17 R37.htm IDEA: XBRL DOCUMENT v2.4.0.8
Stock-Based Compensation - Additional Information (Detail) (USD $)
3 Months Ended 1 Months Ended 3 Months Ended 1 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Stock Options
Jun. 30, 2013
Stock Options
Jun. 30, 2014
Restricted Stock and Restricted Stock Units
Jun. 30, 2013
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
Jun. 30, 2014
Performance Based Restricted Stock and Restricted Stock Units
May 31, 2014
Performance Based Restricted Stock and Restricted Stock Units
Share Based Awards
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
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Aggregate intrinsic value of options exercised in period $ 800,000                      
Fair value of options vested in period 2,200,000                      
Unrecognized stock-based compensation expense     5,900,000   18,500,000       9,400,000      
Unrecognized stock-based compensation expense, weighted-average recognition period     2 years 7 months 6 days   2 years 2 months 12 days       2 years 1 month 6 days      
Weighted average grant-date fair value for options granted $ 8.78 $ 9.68                    
Expected dividend yield 0.00%                      
Weighted average grant-date fair value for restricted stock and restricted stock units granted         $ 21.55 $ 23.15            
Fair value of restricted stock and restricted stock units vested in period         8,800,000 5,700,000            
Shares of award granted         610,000   284,000 284,000   379,752 268,988 195,188
Shares of award granted, performance target met                 234,000      
Shares of award granted, it is probable that the prescribed performance targets will be met                 50,000      
Stock-based compensation $ 4,290,000 $ 3,921,000 $ 799,000 $ 925,000         $ 1,600,000