Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION (Restricted Stock Awards) (Details)

v3.19.3.a.u2
STOCK-BASED COMPENSATION (Restricted Stock Awards) (Details) - Restricted Stock [Member] - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Summary of restricted stock [Roll Forward]      
Unvested at beginning of period (in shares) 1,399,181 1,607,000 1,080,000
Granted (in shares) 415,000 535,000 1,132,000
Forfeited (in shares) (26,000) (37,000) (82,000)
Vested (in shares) (618,000) (706,000) (523,000)
Unvested at end of period (in shares) 1,169,582 1,399,181 1,607,000
Summary of restricted stock awards, additional disclosures [Abstract]      
Unvested at beginning of period (in dollars per share) $ 38.13 $ 31.79 $ 21.67
Granted (in dollars per share) 57.58 44.54 35.97
Forfeited (in dollars per share) 38.45 30.38 22.96
Vested (in dollars per share) 36.54 28.35 21.89
Unvested at end of period (in dollars per share) $ 45.80 $ 38.13 $ 31.79