XML 33 R81.htm IDEA: XBRL DOCUMENT v2.4.1.9
RETIREMENT ANNUITY AND GUARANTEED CONTINUOUS EMPLOYMENT PLANS (Changes in Fair Value of Level 3 Pension Plan Assets) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Retirement Annuity and Guaranteed Continuous Employment Plans    
Fair value of plan assets at beginning of year $ 939,995us-gaap_DefinedBenefitPlanFairValueOfPlanAssets $ 813,897us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Realized and unrealized (losses) gains 108,060us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets 101,044us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets
Fair value of plan assets at end of year 1,010,937us-gaap_DefinedBenefitPlanFairValueOfPlanAssets 939,995us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Significant Unobservable Inputs (Level 3)    
Retirement Annuity and Guaranteed Continuous Employment Plans    
Fair value of plan assets at end of year 38,015us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		 32,563us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
Private equity funds    
Retirement Annuity and Guaranteed Continuous Employment Plans    
Fair value of plan assets at end of year 38,015us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_PrivateEquityFundsMember		 [1] 32,563us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_PrivateEquityFundsMember		 [1]
Private equity funds | Significant Unobservable Inputs (Level 3)    
Retirement Annuity and Guaranteed Continuous Employment Plans    
Fair value of plan assets at beginning of year 32,563us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_PrivateEquityFundsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		  
Purchases, sales, issuances and settlements (283)us-gaap_DefinedBenefitPlanPurchasesSalesAndSettlements
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_PrivateEquityFundsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		  
Realized and unrealized (losses) gains 5,735us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_PrivateEquityFundsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		  
Fair value of plan assets at end of year 38,015us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_PrivateEquityFundsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		  
The amount of total (losses) gains during the period attributable to the change in unrealized (losses) gains relating to Level 3 net assets still held at the reporting date $ 4,887us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_PrivateEquityFundsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		  
[1] Private equity funds consist of four funds seeking capital appreciation by investing in private equity investment partnerships and venture capital companies. Funds are comprised of unrestricted and restricted publicly traded securities and privately held securities. Unrestricted securities are valued at the closing market price on the reporting date. Restricted securities may be valued at a discount from such closing public market price, depending on facts and circumstances. Privately held securities are valued at fair value as determined by the fund directors and general partners.