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Share-Based Compensation (Restricted Stock Units Activity) (Details) - Restricted Stock Units (RSUs) - $ / shares
9 Months Ended
Aug. 04, 2015
Jul. 01, 2015
May. 11, 2015
Dec. 31, 2015
Dec. 31, 2014
Shares          
Outstanding, beginning of period (in shares)       362,300 437,500
Granted (in shares) 2,075 2,841 185,904 266,100 104,400
Vested and issued (in shares)       (153,600) (122,800)
Forfeited (in shares)       (1,400) (21,300)
Outstanding, end of period (in shares)       473,400 397,800
Vested, end of period (in shares)       69,800 76,600
Weighted- Average Grant-Date Fair Value          
Outstanding, beginning of period, weighted-average grant-date fair value (in USD per share)       $ 22.74 $ 16.76
Granted, weighted-average grant-date fair value (in USD per share)       42.41 33.30
Vested and issued, weighted-average grant-date fair value (in USD per share)       18.16 13.62
Forfeited, weighted-average grant-date fair value (in USD per share)       33.50 20.77
Outstanding, end of period, weighted-average grant-date fair value (in USD per share)       35.25 21.86
Vested, end of period, weighted-average grant-date fair value (in USD per share)       $ 14.76 $ 11.62