Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION (Stock Options) (Details)

v3.10.0.1
STOCK-BASED COMPENSATION (Stock Options) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Stock-based compensation, additional disclosures [Abstract]      
Intrinsic value of stock options exercised $ 28,100 $ 57,500 $ 8,500
Exercise of stock options (24,327) 51,069 20,299
Cash received from exercise of stock options $ 22,568 $ 51,069 $ 20,299
Shares available for future grants (in shares) 23,400    
Total intrinsic value, options outstanding $ 580,400    
Total intrinsic value, options exercisable $ 526,600    
Stock Options [Member]      
Summary of stock option activity [Roll Forward]      
Outstanding at beginning of period (in shares) 14,239 16,283 16,309
Granted (in shares) 255 1,164 1,103
Exercised (in shares) (2,694) (3,138) (1,063)
Forfeited or expired (in shares) (16) (70) (66)
Outstanding at end of period (in shares) 11,784 14,239 16,283
Exercisable at end of period (in shares) 10,693 11,906 12,628
Summary of stock option activity, additional disclosures [Abstract]      
Price, Outstanding at beginning of period (in dollars per share) $ 14.52 $ 13.55 $ 13.54
Price, Granted (in dollars per share) 44.05 33.48 19.53
Price, Exercised (in dollars per share) 8.38 16.27 19.10
Price, Forfeited or expired (in dollars per share) 28.57 24.05 22.39
Price, Outstanding at end of period (in dollars per share) 16.55 14.52 13.55
Price, Exercisable at end of period (in dollars per share) 14.61 12.00 12.01
Weighted average fair value per option granted (in dollars per share) $ 14.05 $ 10.18 $ 6.98
Stock-based compensation, additional disclosures [Abstract]      
Expiration period 10 years    
Stock Incentive Plan [Member]      
Stock-based compensation, additional disclosures [Abstract]      
Shares available for future grants (in shares) 7,800    
Minimum [Member] | Stock Options [Member]      
Stock-based compensation, additional disclosures [Abstract]      
Vesting period 2 years    
Maximum [Member] | Stock Options [Member]      
Stock-based compensation, additional disclosures [Abstract]      
Vesting period 5 years