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Calculation of Basic and Diluted Common Shares Outstanding (Detail) - shares
3 Months Ended 9 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Earnings Per Share [Abstract]        
Weighted-Average Shares of Common Stock Outstanding 40,049,456 41,494,149 41,096,702 41,451,801
Assumed Exercise of Outstanding Dilutive Options 492,344 807,584 568,699 450,870
Less Shares Repurchased from Proceeds of Assumed Exercised Options (296,670) (650,819) (362,568) (344,307)
Restricted Stock Units 212,919 183,676 190,506 124,177
Weighted-Average Common Stock and Dilutive Securities Outstanding 40,458,049 41,834,590 41,493,339 41,682,541
Shares Excluded Due to Anti-Dilution Effects 7,528 413,656 4,298 757,879