STOCK-BASED COMPENSATION (Narrative) (Details) - USD ($) shares in Millions	3 Months Ended		6 Months Ended		52 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Oct. 31, 2017	Oct. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 3,500,000	$ 2,900,000	$ 6,600,000	$ 5,200,000
Income tax benefit	$ 700,000	$ 800,000	$ 1,300,000	$ 1,500,000
Shares authorized for repurchase						$ 600,000,000	$ 300,000,000
Repurchases of common stock (in shares)	0.2	0.1	0.5	0.2	5.3
Repurchases of common stock	$ 12,200,000	$ 5,500,000	$ 26,482,000	$ 12,300,000	$ 275,300,000
Stock repurchase program, remaining authorized repurchase amount	324,700,000		324,700,000		324,700,000
Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	27,100,000		$ 27,100,000		27,100,000
Period for recognition (in years)			2 years 8 months
Fair value restricted stock	7,000,000	$ 4,500,000	$ 8,300,000	6,000,000
Performance stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 1,300,000		1,300,000		$ 1,300,000
Fair value restricted stock			$ 500,000	$ 1,400,000
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)			3 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)			5 years