EMPLOYEE BENEFIT PLANS (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Change in plan assets:
Fair value of plan assets at end of year	$ 42,518	$ 39,053
Pension Benefits
Change in benefit obligations:
Benefit obligations at beginning of year	66,645	63,306
Service cost		18
Interest cost	3,189	3,338
Actuarial loss	7,218	4,034
Benefits paid	(4,228)	(4,051)
Benefit obligations at end of year	72,824	66,645
Change in plan assets:
Fair value of plan assets at beginning of year	39,053	41,255
Actual return on plan assets	5,336	(443)
Employer contributions	2,357	2,292
Benefits paid	(4,228)	(4,051)
Fair value of plan assets at end of year	42,518	39,053
Funded status	(30,306)	(27,592)
Accumulated Benefit Obligations	$ 72,824	$ 66,645
Weighted average assumption used to determine benefit obligations
Expected long-term return on plan assets (as a percent)	7.50%	7.50%
Pension Benefits | Minimum
Weighted average assumption used to determine benefit obligations
Discount rate (as a percent)	3.87%	4.79%
Pension Benefits | Maximum
Weighted average assumption used to determine benefit obligations
Discount rate (as a percent)	4.16%	4.98%