Note 6 - Real Estate Owned (REO), Held as Investment, Net (Detail) - REO, Held as Investment, by Geographic Area (USD $)	Dec. 31, 2012		Mar. 31, 2012	Dec. 31, 2011		Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010
Number of Properties	4		2	9		38	2	3
Property Net Book Value (in Dollars)	$ 181,333,000			$ 161,402,000					$ 115,411,000
Non-Rentals [Member] | San Francisco [Member]
Number of Properties	2			1
Property Net Book Value (in Dollars)	11,398,000			3,141,000
Non-Rentals [Member] | San Francisco Bay Area [Member]
Number of Properties	1	[1]		1	[1]
Property Net Book Value (in Dollars)	1,210,000	[1]		1,210,000	[1]
Non-Rentals [Member] | Northern California [Member]
Number of Properties	2	[1]		1	[1]
Property Net Book Value (in Dollars)	5,335,000	[1]		3,820,000	[1]
Non-Rentals [Member] | Southern California [Member]
Number of Properties	1
Property Net Book Value (in Dollars)	8,824,000
Non-Rentals [Member]
Number of Properties	6			3
Property Net Book Value (in Dollars)	26,767,000			8,171,000
Rental Property [Member] | San Francisco [Member]
Number of Properties	5			4
Property Net Book Value (in Dollars)	17,962,000			14,235,000
Rental Property [Member] | San Francisco Bay Area [Member]
Number of Properties	7	[1]		7	[1]
Property Net Book Value (in Dollars)	22,553,000	[1]		23,371,000	[1]
Rental Property [Member] | Northern California [Member]
Number of Properties	5	[1]		4	[1]
Property Net Book Value (in Dollars)	45,480,000	[1]		45,992,000	[1]
Rental Property [Member] | Southern California [Member]
Number of Properties	2			2
Property Net Book Value (in Dollars)	68,571,000			69,633,000
Rental Property [Member]
Number of Properties	19			17
Property Net Book Value (in Dollars)	154,566,000			153,231,000
San Francisco [Member]
Property Net Book Value (in Dollars)	$ 6,398,000			$ 12,609,000

[1] Excluding line(s) above.