Condensed Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010
Assets
Cash and cash equivalents	$ 228,536	$ 242,980	$ 107,015	$ 512,162
Other assets	17,831	22,760
Total assets	2,367,583	2,789,452	3,394,825
Liabilities
Accrued interest and fees payable	61,290	43,327
Other liabilities	17,518	28,286
Total liabilities	2,427,447	2,819,002
Stockholders' Deficit
Total stockholders' deficit	(59,864)	(29,550)	(13,171)	42,214
Total liabilities and stockholders' deficit	2,367,583	2,789,452
Parent Company
Assets
Cash and cash equivalents	2,976	2,584	2,619	1,128
Investment in subsidiaries	116,357	127,690
Loans receivable from non-bank subsidiaries		4,225
Other assets	541	632
Total assets	119,874	135,131
Liabilities
Loans payable	116,300	116,300
Accrued interest and fees payable	60,161	41,042
Other liabilities	3,277	7,339
Total liabilities	179,738	164,681
Stockholders' Deficit
Total stockholders' deficit	(59,864)	(29,550)
Total liabilities and stockholders' deficit	$ 119,874	$ 135,131