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STOCK-BASED COMPENSATION - Equity Awards (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Compensation cost charged against income |  |
Total employee and non-employee share-based compensation expense included in income, before income tax | $ 17,098 | $ 15,324
Stock Options |  |
STOCK-BASED COMPENSATION |  |
Weighted-average grant-date fair value of options granted (in dollars per share) | $ 18.78 | $ 20.30
Total intrinsic value of options exercised | $ 10,900 | $ 178,500
Cash received from option exercises | 14,000 | $ 35,200
Total unrecognized compensation expense related to non-vested shares granted to employees | $ 86,800 |
Cost expected to be recognized over a weighted-average period | 2 years 8 months 12 days |
Stock units expected to vest (in shares) | 14,755 |
Restricted Stock Units and Performance Share Units |  |
STOCK-BASED COMPENSATION |  |
Total unrecognized compensation expense related to non-vested shares granted to employees | $ 47,200 |
Cost expected to be recognized over a weighted-average period | 2 years 10 months 24 days |
Stock units expected to vest (in shares) | 800 |
Number of Shares |  |
Non-vested at the beginning of the period (in shares) | 825 |
Granted (in shares) | 392 |
Vested (in shares) | (271) |
Forfeited/cancelled (in shares) | (1) |
Non-vested at the end of the period (in shares) | 945 |
Weighted Average Grant-Date Fair Value |  |
Non-vested at the beginning of the period (in dollars per share) | $ 57.62 |
Granted (in dollars per share) | 62.39 | $ 59.66
Vested (in dollars per share) | 55.53 |
Forfeited/cancelled (in dollars per share) | 59.67 |
Non-vested at the end of the period (in dollars per share) | $ 60.21 |
Performance Share Units |  |
STOCK-BASED COMPENSATION |  |
Percentage of Target Performance Level | 100.00% |
Number of Shares |  |
Granted (in shares) |  | 0
Performance Share Units | Maximum |  |
STOCK-BASED COMPENSATION |  |
Percentage of Target Performance Level | 200.00% |
Performance Share Units | Minimum |  |
STOCK-BASED COMPENSATION |  |
Percentage of Target Performance Level | 0.00% |

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- Definition The weighted-average period, over which unrecognized compensation is expected to be recognized for equity-based compensation plans, using a decimal to express in number of years. + References No definition available. + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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