EMPLOYEE BENEFIT PLANS (Details) (PLC, USD $)	3 Months Ended		9 Months Ended			1 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 2012 plan year	Oct. 31, 2013 2013 plan year	Sep. 30, 2013 2013 plan year
EMPLOYEE BENEFIT PLANS
Service cost - benefits earned during the period	$ 2,708,000	$ 2,561,000	$ 8,124,000	$ 7,683,000
Interest cost on projected benefit obligation	2,553,000	2,604,000	7,659,000	7,812,000
Expected return on plan assets	(2,759,000)	(2,673,000)	(8,277,000)	(8,019,000)
Amortization of prior service cost/(credit)	(95,000)	(95,000)	(285,000)	(285,000)
Amortization of actuarial losses	2,729,000	2,175,000	8,187,000	6,525,000
Total benefit cost	5,136,000	4,572,000	15,408,000	13,716,000
Contribution made by the company to its defined benefit pension plan					$ 2,000,000	$ 2,300,000	$ 4,600,000
Adjusted funding target percentage to be maintained, minimum							80.00%
Age of eligibility for prescription drug benefit			65 years