STOCK-BASED COMPENSATION (Narrative) (Details) - USD ($) shares in Thousands	3 Months Ended		6 Months Ended		16 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Mar. 13, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 2,600,000	$ 4,300,000	$ 4,700,000	$ 6,100,000
Income tax benefit	$ 800,000	$ 600,000	$ 1,400,000	$ 1,100,000
Share repurchase program shares authorized						$ 300,000,000
Repurchases of common stock (in shares)	100	300	200	600	3,600
Repurchases of common stock	$ 5,100,000	$ 16,100,000	$ 10,134,000	$ 32,200,000	$ 187,800,000
Stock repurchase program, remaining authorized repurchase amount	112,200,000		$ 112,200,000		112,200,000
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Repurchases of common stock (in shares)			203
Repurchases of common stock			$ 2,000
Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	23,200,000		$ 23,200,000		23,200,000
Period for recognition			3 years 51 days
Fair value restricted stock	2,300,000	3,000,000	$ 6,100,000	6,200,000
Performance stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	600,000		600,000		$ 600,000
Fair value restricted stock	$ 0	$ 0	$ 400,000	$ 300,000
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