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STOCK-BASED COMPENSATION (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
STOCK-BASED COMPENSATION |  |  |
Proceeds from stock option exercises |  | $ 40,253 | $ 23,146
Stock options |  |  |
STOCK-BASED COMPENSATION |  |  |
Award vesting period |  | 3 years |
Expiration period |  | 10 years |
Compensation expense |  | $ 14,900 | 15,000
Compensation expense, net of tax |  | 9,700 | 9,800
Income tax benefit related to compensation expense |  | 5,200 | 5,200
Fair value of shares vested |  | 16,100 | 14,100
Proceeds from stock option exercises |  | 40,300 |
Actual tax benefit realized for the tax deduction from option exercises |  | 9,000 |
Unrecognized compensation cost expected to be recognized in future periods |  | $ 15,700 |
Weighted-average period over which compensation cost is expected to be recognized |  | 1 year 4 months 24 days |
Stock options | Selling, research & development and administrative expenses |  |  |
STOCK-BASED COMPENSATION |  |  |
Compensation expense |  | $ 13,200 | $ 13,400
Stock Option Plans | Stock options |  |  |
STOCK-BASED COMPENSATION |  |  |
Weighted-average fair value of stock options granted (in dollars per share) |  | $ 12.83 | $ 14.84
Assumptions used to estimate fair value of stock options granted |  |  |
Dividend Yield (as a percent) |  | 1.70% | 1.70%
Expected Stock Price Volatility (as a percent) |  | 21.90% | 22.10%
Risk-free Interest Rate (as a percent) |  | 1.60% | 2.30%
Expected Life of Option (years) |  | 6 years 10 months 24 days | 6 years 10 months 24 days
Stock options activity |  |  |
Outstanding at the beginning of the period (in shares) |  | 8,107,806 |
Granted (in shares) |  | 1,391,355 |
Exercised (in shares) |  | (1,077,180) |
Forfeited or expired (in shares) |  | (43,648) |
Outstanding at the end of the period (in shares) |  | 8,378,333 |
Exercisable at the end of the period (in shares) |  | 5,666,597 |
Weighted Average Exercise Price |  |  |
Outstanding at the beginning of the period (in dollars per share) |  | $ 46.74 |
Granted (in dollars per share) |  | 64.60 |
Exercised (in dollars per share) |  | 36.12 |
Forfeited or expired (in dollars per share) |  | 61.85 |
Outstanding at the end of the period (in dollars per share) |  | 51.00 |
Exercisable at the end of the period (in dollars per share) |  | $ 44.94 |
Weighted-Average Remaining Contractual Term (Years): |  |  |
Outstanding at the end of the period |  | 6 years 2 months 12 days |
Exercisable at the end of the period |  | 5 years |
Aggregate Intrinsic Value: |  |  |
Outstanding at the end of the period |  | $ 128,066 |
Exercisable at the end of the period |  | 120,010 |
Intrinsic Value of Options Exercised |  | $ 31,920 | $ 22,386
Stock Option Plans | Restricted stock units |  |  |
STOCK-BASED COMPENSATION |  |  |
Award vesting period |  | 3 years |
Compensation expense |  | $ 2,300 | 1,400
Unrecognized compensation cost expected to be recognized in future periods |  | $ 1,500 |
Weighted-average period over which compensation cost is expected to be recognized |  | 1 year 3 months 18 days |
Restricted stock unit activity |  |  |
Balance at the beginning of the period (in shares) |  | 61,750 |
Granted (in shares) |  | 11,448 |
Vested (in shares) |  | (13,331) |
Balance at the end of the period (in shares) |  | 59,867 |
Weighted-Average Grant-Date Fair Value |  |  |
Nonvested at the beginning of the period (in dollars per share) |  | $ 64.09 |
Granted (in dollars per share) |  | 65.87 |
Vested (in dollars per share) |  | 56.75 |
Nonvested at the end of the period (in dollars per share) |  | $ 66.06 |
Fair value of units vested |  | $ 757 | 614
Intrinsic value of units vested |  | $ 877 | $ 761
Stock Option Plans | Director restricted stock unit plan |  |  |
Restricted stock unit activity |  |  |
Granted (in shares) |  | 18,857 |
Balance at the end of the period (in shares) |  | 18,857 |
Weighted-Average Grant-Date Fair Value |  |  |
Granted (in dollars per share) |  | $ 63.10 |
Nonvested at the end of the period (in dollars per share) |  | 63.10 |
Director Stock Option Plans | Stock options |  |  |
STOCK-BASED COMPENSATION |  |  |
Weighted-average fair value of stock options granted (in dollars per share) | $ 14.07 | $ 0 |
Assumptions used to estimate fair value of stock options granted |  |  |
Dividend Yield (as a percent) |  |  | 1.80%
Expected Stock Price Volatility (as a percent) |  |  | 22.20%
Risk-free Interest Rate (as a percent) |  |  | 2.20%
Expected Life of Option (years) |  |  | 6 years 10 months 24 days
Stock options activity |  |  |
Outstanding at the beginning of the period (in shares) |  | 368,668 |
Exercised (in shares) |  | (62,001) |
Outstanding at the end of the period (in shares) |  | 306,667 |
Exercisable at the end of the period (in shares) |  | 224,325 |
Weighted Average Exercise Price |  |  |
Outstanding at the beginning of the period (in dollars per share) |  | $ 53.52 |
Exercised (in dollars per share) |  | 40.67 |
Outstanding at the end of the period (in dollars per share) |  | 56.11 |
Exercisable at the end of the period (in dollars per share) |  | $ 53.41 |
Weighted-Average Remaining Contractual Term (Years): |  |  |
Outstanding at the end of the period |  | 7 years 1 month 6 days |
Exercisable at the end of the period |  | 6 years 8 months 12 days |
Aggregate Intrinsic Value: |  |  |
Outstanding at the end of the period |  | $ 3,080 |
Exercisable at the end of the period |  | 2,840 |
Intrinsic Value of Options Exercised |  | 1,449 | $ 741
New long-term incentive program |  |  |
STOCK-BASED COMPENSATION |  |  |
Compensation expense |  | $ 857 | $ 480
Performance period used to measure cumulative total shareholder return of common stock |  | 3 years |
Expected total expense related to program over the performance period |  | $ 2,700 |

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- Definition Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual period. + 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 (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. + 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 (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + 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 (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. + 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)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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