EMPLOYEE BENEFIT PLANS (Details 7) (PLC, USD $)	12 Months Ended									12 Months Ended																						12 Months Ended								12 Months Ended
	Dec. 31, 2013 Collective short-term investment fund	Dec. 31, 2012 Collective short-term investment fund	Dec. 31, 2013 Collective Russell 3000 index fund	Dec. 31, 2012 Collective Russell 3000 index fund	Dec. 31, 2013 Fidelity Spartan 500 index fund	Dec. 31, 2012 Fidelity Spartan 500 index fund	Dec. 31, 2013 Money market fund	Dec. 31, 2012 Money market fund	Dec. 31, 2011 Money market fund	Dec. 31, 2013 Defined Benefit Pension Plan	Dec. 31, 2012 Defined Benefit Pension Plan	Dec. 31, 2013 Defined Benefit Pension Plan Collective short-term investment fund	Dec. 31, 2012 Defined Benefit Pension Plan Collective short-term investment fund	Dec. 31, 2013 Defined Benefit Pension Plan Equity index funds	Dec. 31, 2012 Defined Benefit Pension Plan Equity index funds	Dec. 31, 2013 Defined Benefit Pension Plan Collective Russell 3000 index fund	Dec. 31, 2012 Defined Benefit Pension Plan Collective Russell 3000 index fund	Dec. 31, 2013 Defined Benefit Pension Plan Fidelity Spartan 500 index fund	Dec. 31, 2012 Defined Benefit Pension Plan Fidelity Spartan 500 index fund	Dec. 31, 2013 Defined Benefit Pension Plan Group deposit administration annuity contract	Dec. 31, 2012 Defined Benefit Pension Plan Group deposit administration annuity contract	Dec. 31, 2013 Defined Benefit Pension Plan Level 1	Dec. 31, 2012 Defined Benefit Pension Plan Level 1	Dec. 31, 2013 Defined Benefit Pension Plan Level 1 Collective short-term investment fund	Dec. 31, 2012 Defined Benefit Pension Plan Level 1 Collective short-term investment fund	Dec. 31, 2013 Defined Benefit Pension Plan Level 1 Equity index funds	Dec. 31, 2012 Defined Benefit Pension Plan Level 1 Equity index funds	Dec. 31, 2013 Defined Benefit Pension Plan Level 2	Dec. 31, 2012 Defined Benefit Pension Plan Level 2	Dec. 31, 2013 Defined Benefit Pension Plan Level 2 Equity index funds	Dec. 31, 2012 Defined Benefit Pension Plan Level 2 Equity index funds	Dec. 31, 2013 Defined Benefit Pension Plan Level 3	Dec. 31, 2012 Defined Benefit Pension Plan Level 3	Dec. 31, 2013 Defined Benefit Pension Plan Level 3 Group deposit administration annuity contract	Dec. 31, 2012 Defined Benefit Pension Plan Level 3 Group deposit administration annuity contract	Dec. 31, 2013 Group life insurance plan Money market fund	Dec. 31, 2012 Group life insurance plan Money market fund	Dec. 31, 2013 Group life insurance plan Level 1 Money market fund	Dec. 31, 2012 Group life insurance plan Level 1 Money market fund	Dec. 31, 2013 Other Postretirement Benefits	Dec. 31, 2012 Other Postretirement Benefits
Fair value hierarchy of Plan's assets
Total investments							$ 6,156,000	$ 6,174,000	$ 6,193,000	$ 180,173,000	$ 152,187,000	$ 3,052,000	$ 6,222,000	$ 120,385,000	$ 95,933,000	$ 74,753,000	$ 61,451,000	$ 45,632,000	$ 34,482,000	$ 56,736,000	$ 50,032,000	$ 48,684,000	$ 40,704,000	$ 3,052,000	$ 6,222,000	$ 45,632,000	$ 34,482,000	$ 74,753,000	$ 61,451,000	$ 74,753,000	$ 61,451,000	$ 56,736,000	$ 50,032,000	$ 56,736,000	$ 50,032,000	$ 6,156,000	$ 6,174,000	$ 6,156,000	$ 6,174,000
Amount transferred into Level 3 from Level 2										4,000,000	6,000,000
Amount of transfers between Level 1 and Level 2										0	0
Amount of transfers between levels																																								0	0
Redemption Notice Period	1 day	1 day	1 day	1 day	1 day	1 day
Reconciliation of beginning and ending balances for fair value measurements for which significant unobservable inputs (level 3) are used
Fair value of plan assets at beginning of year							6,156,000	6,174,000	6,193,000	152,187,000	125,058,000	3,052,000	6,222,000	120,385,000	95,933,000	74,753,000	61,451,000	45,632,000	34,482,000	56,736,000	50,032,000	48,684,000	40,704,000	3,052,000	6,222,000	45,632,000	34,482,000	74,753,000	61,451,000	74,753,000	61,451,000	50,032,000	41,527,000	56,736,000	50,032,000	6,156,000	6,174,000	6,156,000	6,174,000
Interest income																																2,704,000	2,505,000
Transfers from collective short-term investments fund																																4,000,000	6,000,000
Fair value of plan assets at end of year							$ 6,156,000	$ 6,174,000	$ 6,193,000	$ 180,173,000	$ 152,187,000	$ 3,052,000	$ 6,222,000	$ 120,385,000	$ 95,933,000	$ 74,753,000	$ 61,451,000	$ 45,632,000	$ 34,482,000	$ 56,736,000	$ 50,032,000	$ 48,684,000	$ 40,704,000	$ 3,052,000	$ 6,222,000	$ 45,632,000	$ 34,482,000	$ 74,753,000	$ 61,451,000	$ 74,753,000	$ 61,451,000	$ 56,736,000	$ 50,032,000	$ 56,736,000	$ 50,032,000	$ 6,156,000	$ 6,174,000	$ 6,156,000	$ 6,174,000