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Share-Based Compensation (Tables) | 9 Months Ended
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Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary of Restricted Shares | A summary of the Company's RSUs granted under the Plan is presented below:
RSUs |  | Shares (in thousands) |  | Weighted- Average Grant-Date Fair Value
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 |
Nine Months Ended December 31, 2017 |  |  |  |
Vested and nonvested at March 31, 2017 |  | 350.1 |  |  | $ | 39.29 |
Granted |  | 105.8 |  |  | 55.61 |
Vested and issued |  | (53.3 | ) |  | 34.30 |
Forfeited |  | (8.8 | ) |  | 48.49 |
Vested and nonvested at December 31, 2017 |  | 393.8 |  |  | 44.14 |
Vested at December 31, 2017 |  | 90.5 |  |  | 29.88 |
Fair Value of Options Granted | The weighted-average grant-date fair values of the options granted during the nine months ended December 31, 2017 and 2016 were $21.20 and $21.75, respectively.
|  | Nine Months Ended December 31,
|  | 2017 |  | 2016
Expected volatility |  | 35.2 | % |  | 37.8 | %
Expected dividends |  | $ | — |  |  | $ | — |
Expected term in years |  | 6.0 |  |  | 6.0 |
Risk-free rate |  | 2.2 | % |  | 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, 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 |
Nine Months Ended December 31, 2017 |  |  |  |  |  |  |  |  |  |  |
Outstanding at March 31, 2017 |  | 772.3 |  |  | $ | 37.70 |  |  |  |  |
Granted |  | 182.8 |  |  | 56.11 |  |  |  |  |
Exercised |  | (51.0 | ) |  | 28.76 |  |  |  |  |
Forfeited or expired |  | (22.1 | ) |  | 48.15 |  |  |  |  |
Outstanding at December 31, 2017 |  | 882.0 |  |  | 41.77 |  |  | 7.2 |  | $ | 7,019 |
Exercisable at December 31, 2017 |  | 502.9 |  |  | 32.50 |  |  | 6.1 |  | $ | 6,884 |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: 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=96867065&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=96867065&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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