Annual report pursuant to Section 13 and 15(d)

Stock Compensation Plans - Stock Options Outstanding (Detail)

v3.8.0.1
Stock Compensation Plans - Stock Options Outstanding (Detail)
shares in Thousands
12 Months Ended
Mar. 31, 2018
$ / shares
shares
Range 1 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Exercise Price, Minimum $ 15.22
Exercise Price, Maximum $ 15.25
Options Outstanding at March 31, 2018 | shares 18
Weighted Average Exercise Price $ 15.24
Weighted Average Remaining Contractual Life (in years) 1 year 8 months 15 days
Range 2 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Exercise Price, Minimum $ 18.65
Exercise Price, Maximum $ 21.19
Options Outstanding at March 31, 2018 | shares 40
Weighted Average Exercise Price $ 18.95
Weighted Average Remaining Contractual Life (in years) 4 years 18 days
Range 3 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Exercise Price, Minimum $ 30.88
Exercise Price, Maximum $ 44.50
Options Outstanding at March 31, 2018 | shares 11
Weighted Average Exercise Price $ 33.28
Weighted Average Remaining Contractual Life (in years) 2 months 12 days
Range 4 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Exercise Price, Minimum $ 15.22
Exercise Price, Maximum $ 44.50
Options Outstanding at March 31, 2018 | shares 69
Weighted Average Exercise Price $ 20.26
Weighted Average Remaining Contractual Life (in years) 2 years 10 months 2 days