Reserves for Expected Costs of Liquidation and Residual Wind-Down Claims (Details Textual) (USD $)	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 15, 2011	Dec. 14, 2011
Reserves for Expected Costs of Liquidation and Residual Wind-Down Claims (Textual) [Abstract]
Increase (decrease) in estimates of reserves	$ 13,563,000	$ 37,212,000	$ 18,961,000	$ 42,869,000
Amount for Residual Wind Down Claims						0
Reserve for cash transferred for wind down claims					33,800,000
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	6,787,000	4,780,000	11,161,000	10,437,000
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	$ 6,776,000	$ 32,432,000	$ 7,800,000	$ 32,432,000