EMPLOYEE BENEFITS (Expected Benefit Payments) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011
Pension Plans
Defined Benefit Plan, Estimated Future Benefit Payments
Anticipated contributions in 2014	$ 1,700,000
Defined Benefit Plan, Change in Benefit Obligation
Benefit obligation at the beginning of the year	46,017,000		44,755,000
Service cost	0		0	0
Interest cost	1,329,000		1,554,000	1,836,000
Actuarial (gain) loss	(2,983,000)		2,902,000
Benefits paid	(3,285,000)		(3,194,000)
Retiree contributions	0		0
Benefit obligation at the end of the year	41,078,000		46,017,000	44,755,000
Forest Pension Plan
Defined Benefit Plan, Estimated Future Benefit Payments
2014	2,336,000	[1]
2015	2,291,000	[1]
2016	2,230,000	[1]
2017	2,159,000	[1]
2018	2,116,000	[1]
2019-2023	9,433,000	[1]
Wiser Pension Plan
Defined Benefit Plan, Estimated Future Benefit Payments
2014	867,000	[1]
2015	861,000	[1]
2016	851,000	[1]
2017	837,000	[1]
2018	818,000	[1]
2019-2023	3,833,000	[1]
SERP
Defined Benefit Plan, Estimated Future Benefit Payments
2014	133,000
2015	129,000
2016	124,000
2017	120,000
2018	114,000
2019-2023	490,000
Postretirement Benefits Plan
Defined Benefit Plan, Estimated Future Benefit Payments
2014	727,000
2015	713,000
2016	706,000
2017	726,000
2018	734,000
2019-2023	3,849,000
Anticipated contributions in 2014	600,000
Defined Benefit Plan, Change in Benefit Obligation
Benefit obligation at the beginning of the year	17,227,000		13,498,000
Service cost	1,094,000		1,131,000	825,000
Interest cost	603,000		547,000	529,000
Actuarial (gain) loss	(2,935,000)		2,613,000
Benefits paid	(602,000)		(619,000)
Retiree contributions	49,000		57,000
Benefit obligation at the end of the year	$ 15,436,000		$ 17,227,000	$ 13,498,000

[1] Benefit payments expected to be made to participants in the Forest Pension Plan and Wiser Pension Plan are expected to be paid out of funds held in trusts established for each plan.