v3.7.0.1
Stockholders' Equity and Noncontrolling Interests - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Jul. 17, 2015
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2015
Class of Stock [Line Items]        
Share Based Compensation Arrangement By Share Based Payment Award Options Non Vested Stock Outstanding Weighted Average Remaining Contractual Term   19 months    
Preferred stock, shares issued (in shares)   0 0  
Preferred stock, shares outstanding (in shares)   0 0  
Shares issued from treasury stock to settle conversion premium on Convertible Notes 1,889,431   1,889,431  
Preferred stock, shares authorized (in shares)   1,000,000 1,000,000  
Preferred stock, par value (usd per share)   $ 0.01 $ 0.01  
Number of shares of common stock purchased   3,216,654 3,216,654 3,274,829
Repurchased common stock value   $ 178,244 $ 178,244 $ 205,362
Treasury stock, shares (in shares)   10,923,274 10,923,274  
Accelerated Share Repurchase Agreement [Member]        
Class of Stock [Line Items]        
Stock Repurchased and Retired During Period, Shares   2,961,444    
Accelerated Share Repurchases, Final Price Paid Per Share   $ 56.19    
January 1, 2016 to January 19, 2017 [Member] | Accelerated Share Repurchase Agreement [Member]        
Class of Stock [Line Items]        
Accelerated Share Repurchases, Settlement (Payment) or Receipt   $ 166,392