XML 127 R112.htm IDEA: XBRL DOCUMENT v3.19.1
Public Offering and Common Stock Repurchases - Narrative (Details)
12 Months Ended
Dec. 07, 2016
USD ($)
$ / shares
shares
Mar. 31, 2019
USD ($)
shares
Mar. 31, 2018
USD ($)
shares
Mar. 31, 2017
USD ($)
shares
Mar. 31, 2015
USD ($)
Term Loan | Credit Facility          
Payments of debt extinguishment costs $ 195,000,000        
Depositary Shares          
Shares issued (in shares) | shares 8,050,000        
Preferred stock, conversion ratio 0.05        
Redeemable Convertible Preferred Stock          
Shares issued (in shares) | shares 402,500 402,500 402,500    
Dividend rate, percentage 5.75% 5.75%      
Offering price (in dollars per share) | $ / shares $ 50        
Liquidation preference per share (in dollars per share) | $ / shares $ 1,000        
Proceeds from issuance of convertible preferred stock $ 389,700,000        
Accrued dividends   $ 23,200,000 $ 23,200,000 $ 7,300,000  
Cash dividends paid   23,200,000 $ 23,200,000 $ 4,400,000  
Dividends in arrears   0      
Redeemable Convertible Preferred Stock | Minimum          
Shares issued upon conversion (in shares) | shares 39.7020        
Redeemable Convertible Preferred Stock | Maximum          
Shares issued upon conversion (in shares) | shares 47.6420        
Common Stock          
Stock repurchase program, authorized amount (up to)         $ 200,000,000.0
Stock repurchased during period, shares (in shares) | shares     0 0  
Stock repurchase program, remaining authorized repurchase amount   $ 160,000,000