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 |  |

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