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STOCK-BASED COMPENSATION - Stock Option Activity (Details) - Employee Stock Option $ / shares in Units, $ in Thousands | 3 Months Ended
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Mar. 31, 2017 USD ($) $ / shares shares
Number of Options |
Options outstanding at January 1, 2017 | shares | 6,637,239
Options granted | shares | 234,990
Options exercised | shares | (486,524)
Options forfeited/cancelled | shares | (75,456)
Options outstanding at March 31, 2017 | shares | 6,310,249
Options vested and exercisable at March 31, 2017 | shares | 4,302,714
Options expected to vest | shares | 1,891,705
Weighted Average Exercise Price |
Options outstanding at January 1, 2017 | $ / shares | $ 37.20
Options granted | $ / shares | 73.27
Options exercised | $ / shares | 27.92
Options forfeited/cancelled | $ / shares | 57.87
Options outstanding at March 31, 2017 | $ / shares | 39.06
Options vested and exercisable at March 31, 2017 | $ / shares | 30.84
Options expected to vest | $ / shares | $ 56.33
Aggregate Intrinsic Value |
Options outstanding at January 1, 2017 | $ | $ 179,936
Options granted | $ | 529
Options exercised | $ | (23,159)
Options forfeited/cancelled | $ | (1,332)
Options outstanding at March 31, 2017 | $ | 230,072
Options vested and exercisable at March 31, 2017 | $ | 192,245
Options expected to vest | $ | $ 36,302

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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