FAIR VALUE MEASUREMENTS (Details) (USD $)	Mar. 31, 2012	Dec. 31, 2011
Trading securities	$ 50,155,000	$ 46,926,000
Cash surrender value of life insurance policies	23,357,000	20,936,000
Available-for-sale equity securities	975,000	646,000
Total assets	126,234,000	125,208,000
Deferred compensation liabilities	77,726,000	71,688,000
Total liabilities	78,187,000	73,336,000
Fair value of debt	4,300,000,000	4,400,000,000
Amount exceeding or below of carrying value of debt	367,000,000	387,000,000
Quoted Prices in Active Markets for Identical Assets / Liabilities, Level 1 [Member]
Trading securities	50,155,000	46,926,000
Cash surrender value of life insurance policies
Available-for-sale equity securities
Total assets	50,155,000	46,926,000
Deferred compensation liabilities
Total liabilities
Significant Other Observable Inputs, Level 2 [Member]
Trading securities
Cash surrender value of life insurance policies	23,357,000	20,936,000
Available-for-sale equity securities
Total assets	75,104,000	77,636,000
Deferred compensation liabilities	77,726,000	71,688,000
Total liabilities	78,187,000	73,336,000
Significant Unobservable Inputs, Level 3 [Member]
Trading securities
Cash surrender value of life insurance policies
Available-for-sale equity securities	975,000	646,000
Total assets	975,000	646,000
Deferred compensation liabilities
Total liabilities
Interest Rate Swaps [Member]
Derivative instruments, assets	51,265,000	56,520,000
Interest Rate Swaps [Member] | Quoted Prices in Active Markets for Identical Assets / Liabilities, Level 1 [Member]
Derivative instruments, assets
Interest Rate Swaps [Member] | Significant Other Observable Inputs, Level 2 [Member]
Derivative instruments, assets	51,265,000	56,520,000
Interest Rate Swaps [Member] | Significant Unobservable Inputs, Level 3 [Member]
Derivative instruments, assets
Foreign Currency Forward Contracts [Member]
Derivative instruments, assets	482,000	180,000
Derivative instruments, liabilities	461,000	1,648,000
Foreign Currency Forward Contracts [Member] | Quoted Prices in Active Markets for Identical Assets / Liabilities, Level 1 [Member]
Derivative instruments, assets
Derivative instruments, liabilities
Foreign Currency Forward Contracts [Member] | Significant Other Observable Inputs, Level 2 [Member]
Derivative instruments, assets	482,000	180,000
Derivative instruments, liabilities	461,000	1,648,000
Foreign Currency Forward Contracts [Member] | Significant Unobservable Inputs, Level 3 [Member]
Derivative instruments, assets
Derivative instruments, liabilities