Derivative Instruments And Hedging Activities (Effect On Earnings And Equity Statements) (Details) (USD $)	12 Months Ended
	Mar. 31, 2013		Mar. 31, 2012		Mar. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) on derivative instruments	$ 517,000		$ 517,000		$ 1,633,000
Reclassification Adjustment on Derivatives Included in Net Income, Tax	200,000		200,000		1,500,000
Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) on derivative instruments	517,000		517,000		1,633,000
Net gain (loss) on derivative instruments, tax effect	(191,000)		(191,000)		(443,000)
Net gain (loss) on derivative instruments, after tax	326,000		326,000		1,190,000
Interest Expense [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Reclassification adjustments to income	517,000	[1]	517,000	[1]	4,242,000	[1]
Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) on derivative instruments					4,000,000
Net gain (loss) on derivative instruments, after tax					2,700,000
Interest Rate Swap [Member] | Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Increase (Decrease) in Fair Value of Interest Rate Fair Value Hedging Instruments	(4,200,000)
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge	(4,300,000)
Interest Rate Swap [Member] | Interest Expense [Member] | Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Increase (Decrease) in Fair Value of Interest Rate Fair Value Hedging Instruments	(4,244,000)		1,648,000		5,711,000
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge	4,273,000		(1,597,000)		(5,563,000)
Amount of gain (loss) recognized in pre-tax income	$ 29,000		$ 51,000		$ 148,000

[1] The tax effects of the reclassification adjustments were $0.2 million, $0.2 million and $1.5 million for the years ended March 31, 2013, 2012 and 2011, respectively.