EMPLOYEE BENEFITS (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Contribution Benefit Plans Disclosure [Line Items]
Contribution expenses	$ 6.0	$ 6.4	$ 5.2
Grade Level 1 | Maximum
Defined Contribution Benefit Plans Disclosure [Line Items]
Annual profit sharing contribution (as a percent)	4.50%
Grade Level 2 | Maximum
Defined Contribution Benefit Plans Disclosure [Line Items]
Annual profit sharing contribution (as a percent)	13.40%