Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Expense - Restricted Shares (Details)

v3.19.2
Stock-Based Compensation Expense - Restricted Shares (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Issuance of restricted stock as deferred compensation to employees and directors   20,216  
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period, Value   $ 411  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Exercised (in shares)     (111,611)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]      
Exercised, weighted average exercise price (in dollars per share)     $ 22.74
Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Aggregate intrinsic value $ 5,809    
Total unrecognized expense related to non-vested stock option awards $ 3,058    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Outstanding, beginning of period (in shares) 229,112 208,146 192,221
Granted (in shares) 115,378 119,302 135,855
Exercised (in shares) (101,874) (88,084)  
Forfeited (in shares) (5,591) (10,252) (8,319)
Outstanding, end of period (in shares) 237,025 229,112 208,146
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]      
Options outstanding, weighted average grant price, beginning of period (in dollars per share) $ 19.55 $ 20.64 $ 23.36
Granted, weighted average exercise price (in dollars per share) 23.44 19.16 18.65
Exercised, weighted average exercise price (in dollars per share) 19.93 21.51  
Forfeited, weighted average exercise price (in dollars per share) 19.98 20.05 21.25
Options outstanding, weighted average grant price, end of period (in dollars per share) $ 21.26 $ 19.55 $ 20.64
Stock based compensation, recognition period 1 year 5 months 13 days    
Performance Shares      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Grants in period (shares) 68,178,000 73,684,000 47,486,000
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period, Value $ 1,654 $ 1,420 $ 881
Total unrecognized expense related to non-vested stock option awards $ 1,622    
Vested shares 36,611,000 0 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]      
Stock based compensation, recognition period 1 year 9 months 5 days    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Fair Value $ 0    
Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 0    
Minimum | Performance Shares      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement By Share-based Payment Award, Percentage Of Target Shares 0.00%    
Share Based Compensation Arrangement, Possible Number Of Shares Issued Each Year 0 0 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 0    
Maximum | Performance Shares      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement By Share-based Payment Award, Percentage Of Target Shares 200.00%    
Share Based Compensation Arrangement, Possible Number Of Shares Issued Each Year 131,050,000 147,368,000 94,972,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 15,920    
Common Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Issuance of restricted stock as deferred compensation to employees and directors 20,064    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Exercised (in shares) (37,906) (42,636) (43,121)
Executive Officers | Performance Shares      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Grants in period (shares) 10,613