FINANCIAL INSTRUMENTS AND DERIVATIVES Summary of Notional Amounts and Fair Value of the Company's Fair Value Hedges (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	$ (162,019)
Interest Rate Contract
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	4,757
Interest Rate Contract | More than Two and within Three Years from Balance Sheet Date
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Notional Amount of Interest Rate Derivatives	45,000
Interest Rate Contract | More than Three and within Four Years from Balance Sheet Date
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Notional Amount of Interest Rate Derivatives	60,000
Interest Rate Contract | More than Five Years from Balance Sheet Date and Thereafter
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Notional Amount of Interest Rate Derivatives	45,000
Us Dollar Denominated [Member] | Interest Rate Contract
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	4,757
Us Dollar Denominated [Member] | Interest Rate Contract | More than Two and within Three Years from Balance Sheet Date
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Notional Amount of Interest Rate Derivatives	45,000
Us Dollar Denominated [Member] | Interest Rate Contract | More than Three and within Four Years from Balance Sheet Date
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Notional Amount of Interest Rate Derivatives	60,000
Us Dollar Denominated [Member] | Interest Rate Contract | More than Five Years from Balance Sheet Date and Thereafter
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Notional Amount of Interest Rate Derivatives	$ 45,000