Reserves for Expected Costs of Liquidation and Residual Wind-Down Claims (Details Textual) (USD $)	3 Months Ended	6 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Sep. 30, 2011	Dec. 15, 2011
Reserves for Expected Costs of Liquidation and Residual Wind-Down Claims (Textual) [Abstract]
Increase (decrease) in estimates of reserves	$ 4,678,000	$ 5,398,000	$ 5,657,000
Amount for Residual Wind Down Claims				0
Reserve for Expected Reporting Costs [Member]
Reserves for Expected Costs of Liquidation and Residual Wind-Down Claims (Textual) [Abstract]
Increase (decrease) in estimates of reserves	413,000	4,374,000	5,657,000
Reserve for Expected Wind Down Costs [Member]
Reserves for Expected Costs of Liquidation and Residual Wind-Down Claims (Textual) [Abstract]
Increase (decrease) in estimates of reserves	$ 4,265,000	$ 1,024,000