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Share-Based Compensation (Tables) | 9 Months Ended
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Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary of Restricted Shares | A summary of the Company's restricted stock units granted under the Plan is presented below:
Restricted Stock Units |  | Shares (in thousands) |  | Weighted- Average Grant-Date Fair Value
Nine months ended December 31, 2015 |  |  |  |
Vested and nonvested at March 31, 2015 |  | 362.3 |  |  | $ | 22.74 |
Granted |  | 266.1 |  |  | 42.41 |
Vested and issued |  | (153.6 | ) |  | 18.16 |
Forfeited |  | (1.4 | ) |  | 33.50 |
Vested and nonvested at December 31, 2015 |  | 473.4 |  |  | 35.25 |
Vested at December 31, 2015 |  | 69.8 |  |  | 14.76 |
Nine months ended December 31, 2016 |  |  |  |
Vested and nonvested at March 31, 2016 |  | 467.8 |  |  | $ | 35.22 |
Granted |  | 68.4 |  |  | 55.44 |
Vested and issued |  | (94.7 | ) |  | 28.51 |
Forfeited |  | (91.4 | ) |  | 41.71 |
Vested and nonvested at December 31, 2016 |  | 350.1 |  |  | 39.29 |
Vested at December 31, 2016 |  | 63.4 |  |  | 20.12 |
Fair Value of Options Granted |
|  | Nine months ended December 31,
|  | 2016 |  | 2015
Expected volatility |  | 37.8 | % |  | 40.2 | %
Expected dividends |  | $ | — |  |  | $ | — |
Expected term in years |  | 6.0 |  |  | 6.0 |
Risk-free rate |  | 1.7 | % |  | 1.7 | %
Stock Option Activity | A summary of option activity under the Plan is as follows:
Options |  | Shares (in thousands) |  | Weighted- Average Exercise Price |  | Weighted- Average Remaining Contractual Term (years) |  | Aggregate Intrinsic Value (in thousands)
Nine months ended December 31, 2015 |  |  |  |  |  |  |  |
Outstanding at March 31, 2015 |  | 871.2 |  |  | $ | 23.40 |  |  |  |  |
Granted |  | 208.2 |  |  | 42.13 |  |  |  |  |
Exercised |  | (336.9 | ) |  | 18.99 |  |  |  |  |
Forfeited or expired |  | (2.1 | ) |  | 38.21 |  |  |  |  |
Outstanding at December 31, 2015 |  | 740.4 |  |  | 30.63 |  |  | 7.9 |  | $ | 15,325 |
Exercisable at December 31, 2015 |  | 313.5 |  |  | 21.68 |  |  | 6.7 |  | $ | 9,341 |
Nine months ended December 31, 2016 |  |  |  |  |  |  |  |  |  |  |
Outstanding at March 31, 2016 |  | 727.7 |  |  | $ | 30.70 |  |  |  |  |
Granted |  | 264.3 |  |  | 55.86 |  |  |  |  |
Exercised |  | (107.9 | ) |  | 31.91 |  |  |  |  |
Forfeited or expired |  | (92.2 | ) |  | 42.62 |  |  |  |  |
Outstanding at December 31, 2016 |  | 791.9 |  |  | 37.54 |  |  | 7.4 |  | $ | 12,543 |
Exercisable at December 31, 2016 |  | 387.0 |  |  | 25.70 |  |  | 6.3 |  | $ | 10,217 |

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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