PENSION AND POSTRETIREMENT BENEFITS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Qualified pension plan
Components of Net Periodic Benefit Cost
Interest Cost		$ 461
Expected return on plan assets		(874)
Amortization of prior service cost		111
Amortization of net loss		6,542
Net periodic pension cost		6,240
Postretirement Benefit
Components of Net Periodic Benefit Cost
Service Cost	415	523
Interest Cost	395	418
Amortization of net loss	205	280
Net periodic pension cost	$ 1,015	$ 1,221