STOCK-BASED COMPENSATION (Narrative) (Details) - USD ($) shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Mar. 13, 2015	Mar. 12, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 4,300,000	$ 2,000,000	$ 6,100,000	$ 4,300,000
Income tax benefit	600,000	500,000	1,100,000	1,000,000
Repurchases of common stock			$ 32,203,000
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)			2.5
Repurchases of common stock			$ 136,500,000
Stock repurchase program, remaining authorized repurchase amount	163,500,000		163,500,000
Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	15,600,000		$ 15,600,000
Period for recognition			3 years 4 months
Fair value restricted stock	3,000,000	$ 5,300,000	$ 6,200,000	7,600,000
Performance stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	2,300,000		2,300,000
Unrecognized compensation cost	$ 3,200,000		3,200,000
Fair value restricted stock			$ 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