Reserves for Expected Costs of Liquidation and Residual Wind-Down Claims (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Reserves for Expected Costs of Liquidation and Residual Wind-Down Claims (Textual) [Abstract]
Increase (decrease) in estimates of reserves	$ 720	$ 5,657
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	3,961	5,657
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	$ (3,241)