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BASIC AND DILUTED NET EARNINGS PER SHARE (Details)
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3 Months Ended | ||
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Mar. 31, 2015
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Mar. 31, 2014
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Dec. 31, 2014
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| BASIC AND DILUTED NET EARNINGS PER SHARE [Abstract] | |||
| Options to purchase Class A common stock | 1,715,252us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 2,030,459us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 1,816,204us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber |
| Dilutive shares | 574,620us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment | 816,829us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment | |
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- Details
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- Definition
Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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