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STOCK OPTION PLANS (Tables) | 12 Months Ended
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Mar. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Weighted-Average Assumptions Used to Value Option Awards | The weighted-average assumptions used in the Black-Scholes model to value the option awards in fiscal 2018 and 2017 are as follows:
|  | 2018 |  |  | 2017 |
Dividend Yield |  |  | 1.3 | % |  |  | 1.3 | %
Expected Volatility |  |  | 36.3 | % |  |  | 36.5 | %
Risk Free Interest Rate |  |  | 2.10 | % |  |  | 1.40 | %
Expected Life |  | 6.0 years |  |  | 6.0 years |
Stock Option Activity | The following table shows stock option activity for the years presented:
|  | For the Years Ended March 31, |
|  | 2018 |  |  | 2017 |  |  | 2016 |
|  | Number of Shares |  |  | Weighted Average Exercise Price |  |  | Number of Shares |  |  | Weighted Average Exercise Price |  |  | Number of Shares |  |  | Weighted Average Exercise Price |
Outstanding Options at Beginning of Year |  |  | 1,323,379 |  |  | $ | 66.07 |  |  |  | 1,817,763 |  |  | $ | 53.03 |  |  |  | 1,665,565 |  |  | $ | 46.37 |
Granted |  |  | 119,986 |  |  | $ | 100.20 |  |  |  | 202,364 |  |  | $ | 77.76 |  |  |  | 318,572 |  |  | $ | 79.83 |
Exercised |  |  | (448,295 | ) |  | $ | 60.27 |  |  |  | (677,566 | ) |  | $ | 34.46 |  |  |  | (137,874 | ) |  | $ | 27.58 |
Cancelled |  |  | (36,934 | ) |  | $ | 79.97 |  |  |  | (19,182 | ) |  | $ | 70.30 |  |  |  | (28,500 | ) |  | $ | 86.35 |
Outstanding Options at End of Year |  |  | 958,136 |  |  | $ | 72.52 |  |  |  | 1,323,379 |  |  | $ | 66.07 |  |  |  | 1,817,763 |  |  | $ | 53.03 |
Options Exercisable at End of Year |  |  | 651,218 |  |  |  |  |  |  |  | 874,116 |  |  |  |  |  |  |  | 1,285,412 |  |  |  |  |
Weighted Average Fair Value of Options Granted during the Year |  |  |  |  |  | $ | 33.37 |  |  |  |  |  |  | $ | 25.22 |  |  |  |  |  |  | $ | 24.27 |
Stock Options Outstanding | The following table summarizes information about stock options outstanding at March 31, 2018:
|  | Options Outstanding |  |  | Options Exercisable |
Range of Exercise Prices |  | Number of Shares Outstanding |  |  | Weighted Average Remaining Contractual Life |  |  | Weighted Average Exercise Price |  |  | Number of Shares Outstanding |  |  | Weighted Average Exercise Price |
$23.17 - $29.84 |  |  | 65,912 |  |  |  | 3.35 |  |  | $ | 23.27 |  |  |  | 65,912 |  |  | $ | 23.27 |
$33.43 - $37.34 |  |  | 99,582 |  |  |  | 4.21 |  |  | $ | 33.94 |  |  |  | 99,582 |  |  | $ | 33.94 |
$53.22 - $77.67 |  |  | 307,424 |  |  |  | 7.00 |  |  | $ | 71.12 |  |  |  | 183,248 |  |  | $ | 69.79 |
$79.73 - $106.00 |  |  | 485,218 |  |  |  | 7.37 |  |  | $ | 88.02 |  |  |  | 302,476 |  |  | $ | 84.72 |
|  |  | 958,136 |  |  |  | 6.65 |  |  | $ | 72.52 |  |  |  | 651,218 |  |  | $ | 66.53 |
Summary of Activity for Nonvested Restricted Shares | The following table summarizes the activity for nonvested restricted shares during the fiscal year ended March 31, 2018:
|  | Number of Shares |  |  | Weighted Average Grant Date Fair Value |
Restricted Stock Beginning of Year |  |  | 371,213 |  |  | $ | 60.33 |
Granted |  |  | 107,964 |  |  | $ | 100.05 |
Vested |  |  | (119,187 | ) |  | $ | 80.04 |
Forfeited |  |  | (31,931 | ) |  | $ | 40.00 |
Nonvested Restricted Stock at End of Year |  |  | 328,059 |  |  | $ | 65.76 |

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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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