XML 62 R50.htm IDEA: XBRL DOCUMENT v3.5.0.1
Stock-Based Compensation (Summary Of RSU's Activity) (Details) - $ / shares
12 Months Ended
Apr. 30, 2016
Apr. 30, 2015
Apr. 30, 2014
Employee Performance Based Restricted Stock Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Issued and outstanding, beginning balance 210,944 235,795 279,105
Granted 48,201 79,500 75,600
Cancelled due to non-achievement of performance goals (19,657) (16,218) (23,384)
Settled in common stock (89,665) (79,407) (74,935)
Forfeited (9,056) (8,726) (20,591)
Issued and outstanding, ending balance 140,767 210,944 235,795
Serviced-Based RSUs [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Issued and outstanding, beginning balance 103,850 123,375 155,000
Granted 22,349 40,100 44,092
Cancelled due to non-achievement of performance goals 0 0 0
Settled in common stock (46,950) (54,861) (60,310)
Forfeited (3,537) (4,764) (15,407)
Issued and outstanding, ending balance 75,712 103,850 123,375
Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Issued and outstanding, beginning balance 314,794 359,170 434,105
Granted 70,550 119,600 119,692
Cancelled due to non-achievement of performance goals (19,657) (16,218) (23,384)
Settled in common stock (136,615) (134,268) (135,245)
Forfeited (12,593) (13,490) (35,998)
Issued and outstanding, ending balance 216,479 314,794 359,170
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Weighted average grant date fair value, beginning balance $ 27.15 $ 22.79 $ 17.96
Weighted average grant date fair value, Awarded 57.83 30.82 36.09
Weighted average grant date fair value, cancelled due to non-achievement of performance goals 29.92 36.18 17.62
Weighted average grant date fair value, settled in common shares 19.57 17.45 19.75
Weighted average grant date fair value, forfeited 40.99 27.78 23.12
Weighted average grant date fair value, ending balance $ 40.88 $ 27.15 $ 22.79