EMPLOYEE BENEFIT PLANS (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Amounts recognized for pension benefits
Noncurrent Liability	$ 20,867,000	$ 30,394,000
Amounts recognized for pension benefits in accumulated other comprehensive loss
Income tax effect	0	0
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss):
Total recognized (gain) loss in other comprehensive income (loss)	(7,887,000)	4,010,000
Plan assets
Fair value of pension plan assets	45,178,000	42,518,000
Significant Other Observable Inputs (Level 2)
Plan assets
Fair value of pension plan assets	45,178,000	42,518,000
Pooled equity funds | AHGT
Plan assets
Fair value of pension plan assets	25,061,000	23,706,000
Pooled equity funds | Significant Other Observable Inputs (Level 2) | AHGT
Plan assets
Fair value of pension plan assets	25,061,000	23,706,000
Pooled fixed income funds | AHGT
Plan assets
Fair value of pension plan assets	19,160,000	17,671,000
Pooled fixed income funds | Significant Other Observable Inputs (Level 2) | AHGT
Plan assets
Fair value of pension plan assets	19,160,000	17,671,000
Cash management funds
Plan assets
Fair value of pension plan assets	957,000	1,141,000
Cash management funds | Significant Other Observable Inputs (Level 2)
Plan assets
Fair value of pension plan assets	957,000	1,141,000
Pension Benefits
Amounts recognized for pension benefits
Current Liability	306,000	306,000
Noncurrent Liability	20,607,000	30,000,000
Net amounts recognized	20,913,000	30,306,000
Amounts recognized for pension benefits in accumulated other comprehensive loss
Income tax effect	0	0
Net loss	19,692,000	27,579,000
Net amounts recognized	19,692,000	27,579,000
Net loss included in accumulated other comprehensive loss expected to be recognized as a component of net periodic pension cost in the next fiscal year	582,000
Pension and other benefits:
Interest cost	2,880,000	3,189,000
Expected return on plan assets	(2,906,000)	(2,864,000)
Recognized net actuarial loss	914,000	739,000
Net expense	888,000	1,064,000
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss):
Net loss	(6,973,000)	4,749,000
Recognized loss	(914,000)	(739,000)
Total recognized (gain) loss in other comprehensive income (loss)	(7,887,000)	4,010,000
Weighted average assumptions used to determine net periodic cost:
Expected long-term return on plan assets (as a percent)	7.00%	7.50%
Plan assets
Fair value of pension plan assets	$ 45,178,000	$ 42,518,000	$ 39,053,000
Pension Benefits | Minimum
Weighted average assumptions used to determine net periodic cost:
Discount rate (as a percent)	3.87%	4.79%
Pension Benefits | Maximum
Weighted average assumptions used to determine net periodic cost:
Discount rate (as a percent)	4.16%	4.98%