STOCK-BASED COMPENSATION AND EMPLOYEE BENEFIT PLANS (Performance Stock Awards) (Details)	12 Months Ended
	Dec. 31, 2016 USD ($) performance_criteria $ / shares shares	Dec. 31, 2015 USD ($) performance_criteria $ / shares shares	Dec. 31, 2014 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected forfeiture rate employees	6.00%
Number of performance criteria, achieved | performance_criteria	1	1
Number of performance criteria | performance_criteria	4	4
Percentage of original award		20.00%
Stock-based compensation expense | $	$ 10,500,000	$ 8,600,000	$ 8,800,000
Performance Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance evaluation stock-based compensation	2 years
Expected forfeiture rate employees	6.00%
Percentage of original award	20.00%
Number of Shares
Unvested, beginning of period (in shares) | shares	187,274
Granted (in shares) | shares	207,624
Vested (in shares) | shares	(19,981)
Forfeited (in shares) | shares	(154,035)
Unvested, end of period (in shares) | shares	220,882	187,274
Weighted Average Grant-Date Fair Value
Unvested, beginning of period (in dollars per share) | $ / shares	$ 57.13
Granted (in dollars per share) | $ / shares	54.21
Forfeited (in dollars per share) | $ / shares	56.29
Vested (in dollars per share) | $ / shares	60.34
Unvested, end of period (in dollars per share) | $ / shares	$ 54.69	$ 57.13
Total unrecognized compensation cost | $	$ 1,500,000
Total fair value, vested in period | $	$ 1,000,000	$ 600,000	$ 0