Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Section 35

-Paragraph 50

-URI http://asc.fasb.org/extlink&oid=29635418&loc=d3e12355-114930

Name:	us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

EMPLOYEE BENEFIT PLANS (Details 6) (PLC, Defined Benefit Pension Plan, USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
EMPLOYEE BENEFIT PLANS
Total investments	$ 180,173	$ 152,187	$ 125,058
Employer contribution receivable	2,314
Total	182,487	152,187
Cash
EMPLOYEE BENEFIT PLANS
Total investments	3,052	6,222
Equity securities: Collective Russell 3000 Equity Index Fund
EMPLOYEE BENEFIT PLANS
Total investments	74,753	61,451
Equity securities: Fidelity Spartan 500 Equity Index Fund
EMPLOYEE BENEFIT PLANS
Total investments	45,632	34,482
Fixed Income
EMPLOYEE BENEFIT PLANS
Total investments	$ 56,736	$ 50,032