PENSION PLANS AND OTHER POST-RETIREMENT BENEFITS (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2013 item	Dec. 31, 2012	Dec. 31, 2011
Amounts recognized in the consolidated balance sheets
Long-term liabilities	$ (75,754,000)	$ (156,710,000)
Post-retirement Benefit Obligations
Post-retirement benefit obligation
Post-retirement Plan unfunded assets	0
Number of persons eligible to become a new participant	0
Change in benefit obligation
Benefit obligation at the beginning of the year	43,906,000	33,184,000
Service costs	925,000	811,000	749,000
Interest costs	1,575,000	1,756,000	1,690,000
Plan participant contributions	757,000	614,000
Actuarial loss (gain)	(9,552,000)	5,282,000
Benefits paid	(3,966,000)	(4,011,000)
Amendments	1,448,000
Acquisition		6,270,000
Benefit obligation at the end of the year	35,093,000	43,906,000	33,184,000
Change in plan assets
Fair value of plan assets at the beginning of the year	3,410,000
Employer contributions	2,772,000	3,189,000
Plan participant contributions	757,000	614,000
Actual return on plan assets	602,000	197,000
Benefits paid	(3,966,000)	(4,011,000)
Acquisition		3,421,000
Fair value of plan assets at the end of the year	3,575,000	3,410,000
Funded status at year end	(31,518,000)	(40,496,000)
Amounts recognized in the consolidated balance sheets
Current liabilities	(2,429,000)	(2,467,000)
Long-term liabilities	(29,089,000)	(38,029,000)
Amounts recognized in accumulated other comprehensive income
Unamortized prior service credit	183,000	(1,446,000)
Unamortized net actuarial loss (gain)	(7,868,000)	2,055,000
Total	(7,685,000)	609,000
Components of net periodic pension costs
Service costs	925,000	811,000	749,000
Interest costs	1,575,000	1,756,000	1,690,000
Expected return on plan assets	(233,000)	(105,000)
Amortization of: Net actuarial loss			(212,000)
Amortization of: Prior service credit	(180,000)	(189,000)	(189,000)
Net periodic pension (benefit) cost	2,087,000	2,273,000	2,038,000
Changes in plan assets and benefit obligations recognized in other comprehensive income, before tax effects
Actuarial loss (gain), net	(9,922,000)	5,191,000
Prior service credit	1,448,000
Recognized prior service credit	180,000	189,000
Total amount recognized in other comprehensive income, before tax effects	(8,294,000)	5,380,000
Estimated net prior service credit that will be amortized from accumulated other comprehensive loss in net periodic postretirement cost	(500,000)	(200,000)
Weighted-average assumptions used to determine the projected benefit obligations and net periodic benefit cost
Discount rate - net periodic benefit cost (as a percent)	4.00%	5.00%	5.58%
Discount rate - benefit obligation (as a percent)	4.40%	3.90%	5.22%
Change in the assumed healthcare cost trend rate
Health care trend rate assumed for the next fiscal year (as a percent)	7.50%
Ultimate health care cost trend rate (as a percent)	5.00%
Effect of one percent change in the assumed healthcare cost trend rate
Effect of one percent increase on total of service and interest cost	277,000
Effect of one percent decrease on total of service and interest cost	(230,000)
Effect of one percent increase on postretirement benefit obligation	2,063,000
Effect of one percent decrease on postretirement benefit obligation	$ (1,852,000)