STOCK-BASED COMPENSATION (Narrative) (Details) - USD ($) shares in Millions	3 Months Ended		9 Months Ended		19 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Mar. 13, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 3,000,000	$ 500,000	$ 7,700,000	$ 6,600,000
Income tax benefit	$ 900,000	$ 100,000	$ 2,300,000	$ 1,800,000
Share repurchase program authorized						$ 300,000,000
Repurchases of common stock (in shares)	0.1	0.8	0.3	1.3	3.7
Repurchases of common stock	$ 6,200,000	$ 37,600,000	$ 16,348,000	$ 69,800,000	$ 194,000,000
Stock repurchase program, remaining authorized repurchase amount	106,000,000		106,000,000		106,000,000
Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	17,200,000		$ 17,200,000		17,200,000
Period for recognition			3 years
Fair value restricted stock	1,800,000	600,000	$ 7,900,000	6,800,000
Performance stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	200,000		200,000		$ 200,000
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
Reversal of previous expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ (1,400,000)