DERIVATIVE FINANCIAL INSTRUMENTS, Narrative (Details) (USD $)	3 Months Ended
	Jun. 30, 2011
Derivative [Line Items]
Termination value of derivatives in a net liability position	$ 6,000,000
Receive-fixed, Pay-variable Interest Rate Swaps [Member]
Derivative [Line Items]
Number of instruments entered into during the period	2
Notional amount	50,000,000
Net loss recognized in interest expense related to hedge ineffectiveness	82,000
Net reduction to interest expense related to net settlements of derivatives	478,000
Certificates of Deposit [Member]
Derivative [Line Items]
Number of instruments entered into during the period	2
Notional amount	50,000,000
Equity Swap [Member]
Derivative [Line Items]
Number of instruments entered into during the period	2
Term of contract (in years)	5Y
Foreign Exchange Contract [Member]
Derivative [Line Items]
Term of contract (in years)	5Y
Short-term Foreign Exchange [Member]
Derivative [Line Items]
Notional amount	$ 578,100,000