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Share-based Payments (Tables) | 12 Months Ended
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Mar. 31, 2018
Share-based Payments [Abstract] |
Summary of stock option activity | The following is a summary of stock option activity during the year:
|  | Number of Shares |  |  | Weighted Average Exercise Price |
Outstanding at March 31, 2016 |  |  | 1,036,359 |  |  | $ | 14.92 |
Granted |  |  | 170,890 |  |  | $ | 27.27 |
Exercised |  |  | (55,351 | ) |  | $ | 8.65 |
Forfeited |  |  | (8,600 | ) |  | $ | 28.92 |
Outstanding at March 31, 2017 |  |  | 1,143,298 |  |  | $ | 16.97 |
Summary of options outstanding | The following summarizes information about the options outstanding at March 31, 2018:
|  |  | Options Outstanding |  | Options Exercisable
Range of Exercise price |  |  | Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Life In Years |  |  | Aggregate Intrinsic Value |  | Shares |  |  | Weighted Average Exercise Price |  |  | Aggregate Intrinsic Value
$4.17 to $6.25 |  |  |  | 49,000 |  |  | $ | 4.87 |  |  |  | 1.35 |  |  |  |  |  | 49,000 |  |  | $ | 4.87 |  |  |
$6.26 to $7.43 |  |  |  | 354,534 |  |  |  | 6.48 |  |  |  | 4.70 |  |  |  |  |  | 354,534 |  |  |  | 6.48 |  |  |
$7.44 to $19.94 |  |  |  | 211,132 |  |  |  | 9.86 |  |  |  | 5.23 |  |  |  |  |  | 211,132 |  |  |  | 9.86 |  |  |
$19.95 to $34.17 |  |  |  | 528,632 |  |  |  | 27.96 |  |  |  | 8.12 |  |  |  |  |  | 203,358 |  |  |  | 27.54 |  |  |
|  |  |  | 1,143,298 |  |  | $ | 16.97 |  |  |  | 6.24 |  | $ | 8,555,000 |  |  | 818,024 |  |  | $ | 12.49 |  | $ | 8,555,000
Summary of changes in the status of non-vested restricted stock units | The following is a summary of changes in the status of non-vested RSUs during the year:
|  | Number of Shares |  |  | Weighted Average Grant Date Fair Value |
Non-vested at March 31, 2017 |  |  | 126,277 |  |  | $ | 28.26 |
Granted |  |  | 77,854 |  |  | $ | 27.70 |
Vested |  |  | (68,869 | ) |  | $ | 27.41 |
Forfeited |  |  | (1,434 | ) |  | $ | 28.37 |
Non-vested at March 31, 2018 |  |  | 133,828 |  |  | $ | 28.37 |

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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + 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)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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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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