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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) (Parenthetical) (USD $)
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9 Months Ended | 12 Months Ended |
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Dec. 31, 2014
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Mar. 31, 2014
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| Increase (Decrease) in Shareholders' Equity [Roll Forward] | ||
| Proceeds from exercise of stock options (in shares) | 72,400us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised | 265,365us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised |
| Proceeds from exercise of stock options, tax benefits | $ 601,875us-gaap_DeferredTaxExpenseFromStockOptionsExercised | $ 2,867,621us-gaap_DeferredTaxExpenseFromStockOptionsExercised |
| Common stock repurchases (in shares) | 800,291us-gaap_StockRepurchasedDuringPeriodShares | 2,091,699us-gaap_StockRepurchasedDuringPeriodShares |
| X | ||||||||||
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- Definition
Amount of deferred tax expense from write-off of the deferred tax asset related to deductible stock options at exercise. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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