EMPLOYEE BENEFIT PLANS (Details 9) (PLC, USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Other Postretirement Benefits
EMPLOYEE BENEFIT PLANS
Accumulated benefit obligation, end of year	$ 800,000	$ 900,000
Other Postretirement Benefits | Maximum
EMPLOYEE BENEFIT PLANS
Age of eligibility for limited healthcare benefits	65 years
Retiree medical plan | Minimum
EMPLOYEE BENEFIT PLANS
Age of eligibility for prescription drug benefit	65 years
Retiree medical plan | Maximum
EMPLOYEE BENEFIT PLANS
Liability related to prescription drug benefit provided to employees	100,000	100,000
Group life insurance plan | Minimum
EMPLOYEE BENEFIT PLANS
Life insurance benefits	10,000
Group life insurance plan | Maximum
EMPLOYEE BENEFIT PLANS
Life insurance benefits	75,000
Face amount of life insurance benefits funded	$ 50,000