EQUITY (Details) $ / shares in Units, $ in Thousands	3 Months Ended				114 Months Ended
	Jun. 30, 2020 USD ($) Vote / shares $ / shares shares	Mar. 31, 2020 USD ($) $ / shares	Jun. 30, 2019 USD ($) $ / shares shares	Mar. 31, 2019 USD ($) $ / shares	Jun. 30, 2020 USD ($) Vote / shares $ / shares shares	Dec. 31, 2019 $ / shares shares
Common Stock
Common stock, shares authorized (in shares)	325,000,000				325,000,000	325,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.01				$ 0.01	$ 0.01
Common stock, shares issued (in shares)	125,976,027				125,976,027	125,701,889
Common stock, shares outstanding (in shares)	108,757,176				108,757,176	110,656,892
Common stock, votes per share | Vote / shares	1				1
Common Stock in Treasury, at Cost
Common stock held in Treasury (in shares)	17,218,851				17,218,851	15,044,997
Share Repurchase Program
Treasury Stock, Shares, Acquired	992,159		100		15,771,049
Treasury Stock Acquired, Average Cost Per Share | $ / shares	$ 100.54		$ 104.75		$ 64.68
Treasury Stock, Value, Acquired, Cost Method | $	$ 99,800	$ 119,500	$ 10	$ 35,000	$ 1,000
Availability remaining under existing share repurchase authorizations | $	$ 329,900		$ 171,100		$ 329,900
Purchase of Common Stock from Employees
Stock repurchased from employee stock plans (in shares)	2,667		5,179
Average price paid per share (in dollars per share) | $ / shares	$ 100.68		$ 105.21
Preferred stock
Preferred stock, shares authorized (in shares)	20,000,000				20,000,000	20,000,000
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.01				$ 0.01	$ 0.01
Preferred stock, shares issued (in shares)	0				0	0
Preferred stock, shares outstanding (in shares)	0				0	0
Dividends
Cash dividends per share, declared (in dollars per share) | $ / shares	$ 0.36	$ 0.36	0.31	$ 0.31
Cash dividends per share, paid (in dollars per share) | $ / shares	$ 0.36		$ 0.31
Aggregate payout | $	$ 39,500	$ 40,000	$ 34,800	$ 34,800