PENSION AND OTHER POST RETIREMENT BENEFIT PLANS (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Pension Benefits
Defined benefit pension and post retirement benefit plans disclosures
Service cost - benefits earned during the period	$ 800,000	$ 700,000	$ 2,500,000	$ 2,100,000
Interest cost on projected benefit obligations	4,200,000	4,400,000	12,700,000	13,300,000
Expected return on plan assets	(4,200,000)	(4,000,000)	(13,300,000)	(12,100,000)
Amortization of net actuarial loss	700,000	800,000	2,300,000	2,200,000
Net periodic benefit cost	1,500,000	1,900,000	4,200,000	5,500,000
Settlements		9,100,000	100,000	9,100,000
Total net periodic benefit cost	1,500,000	11,000,000	4,300,000	14,600,000
Principal plan losses reclassified to settlements			0	9,100,000
Other Benefits
Defined benefit pension and post retirement benefit plans disclosures
Service cost - benefits earned during the period	200,000	200,000	600,000	700,000
Interest cost on projected benefit obligations	300,000	200,000	1,000,000	800,000
Amortization of net actuarial loss	400,000	400,000	1,300,000	900,000
Amortization of prior service (benefit)		(100,000)	(100,000)	(100,000)
Net periodic benefit cost	900,000	700,000	2,800,000	2,300,000
Total net periodic benefit cost	$ 900,000	$ 700,000	$ 2,800,000	$ 2,300,000