STOCK-BASED COMPENSATION (Narrative) (Details) - USD ($) shares in Millions	3 Months Ended		25 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 13, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 2,300,000	$ 2,100,000
Income tax benefit	$ 800,000	500,000
Share repurchase program authorized				$ 300,000,000
Repurchases of common stock (in shares)	0.1		4.0
Repurchases of common stock	$ 6,796,000		$ 206,700,000
Stock repurchase program, remaining authorized repurchase amount	93,300,000		93,300,000
Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 18,500,000		18,500,000
Period for recognition	3 years
Fair value restricted stock	$ 1,500,000	3,800,000
Performance stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	1,000,000		$ 1,000,000
Fair value restricted stock	$ 1,400,000	$ 400,000
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	5 years