STOCK-BASED COMPENSATION (Narrative) (Details) - USD ($) shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Mar. 13, 2015	Mar. 12, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 500,000	$ 2,100,000	$ 6,600,000	$ 6,400,000
Income tax benefit	$ 100,000	$ 500,000	$ 1,800,000	$ 1,500,000
Repurchases of common stock (in shares)	0.8	0.6	1.3	0.9
Repurchases of common stock	$ 37,600,000	$ 37,600,000	$ 69,813,000	$ 53,800,000
Employee Stock Purchase Plan 2005
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share repurchase program shares authorized					$ 300,000,000	$ 150,000,000
Repurchases of common stock (in shares)			3.3
Repurchases of common stock			$ 174,200,000
Stock repurchase program, remaining authorized repurchase amount	125,800,000		125,800,000
Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	13,200,000		$ 13,200,000
Period for recognition			3 years 73 days
Fair value restricted stock	600,000	1,500,000	$ 6,800,000	9,100,000
Performance stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	1,400,000		900,000
Unrecognized compensation cost	900,000		900,000
Fair value restricted stock	$ 0	$ 0	$ 300,000	$ 0
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restriction period			3 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restriction period			5 years