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Share-based Payments (Tables) | 12 Months Ended
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Mar. 31, 2015
Stock Options and Restricted Stock Awards [Abstract] |
Summary of stock option transactions | The following is a summary of stock option activity during the year ended March 31, 2015:
|  | Number of Shares |  |  | Weighted Average Exercise Price |
Outstanding at March 31, 2014 |  |  | 1,426,968 |  |  | $ | 9.21 |
Granted |  |  | 82,537 |  |  | $ | 22.99 |
Exercised |  |  | (108,734 | ) |  | $ | 9.81 |
Cancelled |  |  | (11,517 | ) |  | $ | 10.32 |
Outstanding at March 31, 2015 |  |  | 1,389,254 |  |  | $ | 9.97 |
Summary of options outstanding | The following table summarizes information about the options outstanding at March 31, 2015:
|  |  | 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 |
$ | 4.170 to $6.250 |  |  |  | 81,000 |  |  | $ | 5.22 |  |  |  | 4.02 |  |  | $ | 1,828,000 |  |  |  | 80,000 |  |  | $ | 5.20 |  |  | $ | 1,808,000 |
$ | 6.460 to $7.430 |  |  |  | 458,335 |  |  |  | 6.52 |  |  |  | 7.45 |  |  |  | 9,749,000 |  |  |  | 430,637 |  |  |  | 6.53 |  |  |  | 9,156,000 |
$ | 8.700 to $9.900 |  |  |  | 251,299 |  |  |  | 9.34 |  |  |  | 8.22 |  |  |  | 4,636,000 |  |  |  | 77,236 |  |  |  | 9.39 |  |  |  | 1,421,000 |
$ | 10.010 to $11.900 |  |  |  | 195,250 |  |  |  | 10.21 |  |  |  | 0.81 |  |  |  | 3,432,000 |  |  |  | 195,250 |  |  |  | 10.21 |  |  |  | 3,432,000 |
$ | 12.000 to $25.510 |  |  |  | 403,370 |  |  | $ | 15.12 |  |  |  | 3.96 |  |  |  | 5,111,000 |  |  |  | 285,112 |  |  | $ | 12.31 |  |  |  | 4,414,000 |
|  |  |  |  | 1,389,254 |  |  | $ | 9.97 |  |  |  | 5.44 |  |  | $ | 24,756,000 |  |  |  | 1,068,235 |  |  | $ | 8.85 |  |  | $ | 20,231,000 |
Summary of changes in the status of non-vested stock options | The following is a summary of changes in the status of non-vested RS during the year ended March 31, 2015:
|  | Number of Shares |  |  | Weighted Average Grant Date Fair Value |
Non-vested restricted stock at March 31, 2014 |  |  | 138,000 |  |  | $ | 9.32 |
Restricted stock granted |  |  | 95,645 |  |  | $ | 24.21 |
Restricted stock vested |  |  | (50,402 | ) |  | $ | 10.51 |
Restricted stock cancelled |  |  | (1,800 | ) |  | $ | 9.32 |
Non-vested restricted stock at March 31, 2015 |  |  | 181,443 |  |  | $ | 16.84 |

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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=6415400&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=6415400&loc=d3e5070-113901 + Details
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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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