Consolidated Statements of Changes in Stockholders' Equity (Deficit) (USD $) In Thousands	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Deficit	Treasury Stock	Deferred Compensation Obligation	Accumulated Other Comprehensive Income (Loss)
Balance at Mar. 31, 2010	$ 42,214	$ 81,596	$ 2,536	$ 114,662	$ (54,677)	$ (90,975)	$ (5,529)	$ (5,399)
Net loss	(41,178)				(41,178)
Reclassification adjustment for realized net gains recognized in income	(8,661)							(8,661)
Reclassification adjustment for net change in unrealized credit related other-than-temporary impairment recognized in income	432							432
Change in net unrealized gains (losses) on available-for-sale securities	(6,324)							(6,324)
Issuance of restricted stock for executive compensation and retirement plans	(2)				(164)	162
Vesting of restricted stock	348					348
Cancellation of unvested restricted stock					69	(69)
Change in stock-based deferred compensation obligation				(3,149)			3,149
Accretion of preferred stock discount		7,412			(7,412)
Balance at Mar. 31, 2011	(13,171)	89,008	2,536	111,513	(103,362)	(90,534)	(2,380)	(19,952)
Net loss	(36,738)				(36,738)
Reclassification adjustment for realized net gains recognized in income	(6,579)							(6,579)
Reclassification adjustment for net change in unrealized credit related other-than-temporary impairment recognized in income	194							194
Reclassification adjustment for realized credit losses recognized in income	364							364
Change in net unrealized gains (losses) on available-for-sale securities	26,105							26,105
Vesting of restricted stock	275					275
Change in stock-based deferred compensation obligation				(1,111)			1,111
Accretion of preferred stock discount		7,413			(7,413)
Balance at Mar. 31, 2012	(29,550)	96,421	2,536	110,402	(147,513)	(90,259)	(1,269)	132
Net loss	(34,172)				(34,172)
Reclassification adjustment for realized net gains recognized in income	247							247
Reclassification adjustment for net change in unrealized credit related other-than-temporary impairment recognized in income	(310)							(310)
Reclassification adjustment for credit related other-than-temporary impairment previously recognized on securities paid-off during the period	(4)							(4)
Reclassification adjustment for realized credit losses recognized in income	722							722
Change in net unrealized gains (losses) on available-for-sale securities	2,792							2,792
Vesting of restricted stock	411					411
Change in stock-based deferred compensation obligation				(368)			368
Accretion of preferred stock discount		7,412			(7,412)
Balance at Mar. 31, 2013	$ (59,864)	$ 103,833	$ 2,536	$ 110,034	$ (189,097)	$ (89,848)	$ (901)	$ 3,579