Annual report pursuant to Section 13 and 15(d)

Stock Compensation Plans - Schedule of Restricted Stock Awards (Detail)

v3.7.0.1
Stock Compensation Plans - Schedule of Restricted Stock Awards (Detail) - Restricted Stock [Member] - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Non-vested, Restricted Stock, Beginning Balance 70 70 64
Restricted Stock, Granted 82 34 30
Restricted Stock, Vested (17) (28) (15)
Restricted Stock, Forfeited (15) (6) (9)
Non-vested, Restricted Stock, Ending Balance 120 70 70
Non-vested, Weighted Average Grant Date Fair Value, Beginning Balance $ 25.03 $ 24.47 $ 21.93
Weighted Average Grant Date Fair Value, Granted 20.43 23.13 28.36
Weighted Average Grant Date Fair Value, Vested 24.27 23.23 23.04
Weighted Average Grant Date Fair Value, Forfeited 23.85 19.75 21.56
Non-vested, Weighted Average Grant Date Fair Value, Ending Balance $ 21.96 $ 25.03 $ 24.47
Non-vested, Aggregate Intrinsic Value, Ending Balance $ 269