EMPLOYEE BENEFIT PLANS (Details 2) (Pension Plan, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Pension Plan
Change in benefit obligations:
Benefit obligations at beginning of year	$ 86,468	$ 73,730
Service cost	2,783	2,682	2,312
Interest cost	3,640	3,246	3,184
Actuarial (gain) loss	(5,479)	8,318
Benefits paid	(1,750)	(1,508)
Benefit obligations at end of year	85,662	86,468	73,730
Change in plan assets:
Fair value of plan assets at beginning of year	55,390	46,192
Employer contribution	2,400	5,029
Actual return on plan assets	11,440	5,677
Benefits paid	(1,750)	(1,508)
Fair value of plan assets at end of year	67,480	55,390	46,192
Funded status at the end of year	(18,182)	(31,078)
Amounts recognized in balance sheet:
Non-current liability	(18,182)	(31,078)
Total amounts recognized in balance sheet	(18,182)	(31,078)
Amounts recognized in accumulated other comprehensive income consist of:
Net actuarial loss	$ (18,230)	$ (33,356)