BENEFIT PLANS (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Pension Benefits [Member]
Net periodic benefit cost [Abstract]
Service cost	$ 985,000	$ 848,000	$ 1,970,000	$ 1,696,000
Interest cost	1,028,000	1,098,000	2,057,000	2,197,000
Expected return on plan assets	(2,451,000)	(2,299,000)	(4,902,000)	(4,598,000)
Amortization of unrecognized net loss	1,008,000	922,000	2,015,000	1,844,000
Amortization of prior service cost	14,000	(37,000)	29,000	(74,000)
Net periodic benefit cost	584,000	532,000	1,169,000	1,065,000
Estimated future employer contributions in current fiscal year			10,000,000
Post-retirement Benefits [Member]
Net periodic benefit cost [Abstract]
Service cost	0	0	0	0
Interest cost	22,000	29,000	44,000	57,000
Expected return on plan assets	0	0	0	0
Amortization of unrecognized net loss	3,000	3,000	6,000	6,000
Amortization of prior service cost	(45,000)	(206,000)	(90,000)	(411,000)
Net periodic benefit cost	$ (20,000)	$ (174,000)	$ (40,000)	$ (348,000)