Note 6 - Other Real Estate Owned (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Other Real Estate, Period Increase (Decrease)	$ 46,300,000
Percentage Of Value Increased Other Real Estate Owned	50.00%
Real Estate Acquired Through Foreclosure	46,400,000	92,700,000
Number of Real Estate Properties		1
Residential Land [Member] | California [Member]
Real Estate Acquired Through Foreclosure	9,100,000	9,900,000
Number of Real Estate Properties	6	5
Residential Land [Member] | Texas Member
Real Estate Acquired Through Foreclosure	12,600,000	11,700,000
Number of Real Estate Properties	4	3
Residential Land [Member] | Washington State Member
Real Estate Acquired Through Foreclosure		1,200,000
Number of Real Estate Properties		3
Residential Land [Member] | Nevada [Member]
Real Estate Acquired Through Foreclosure		3,500,000
Office And Commercial Use Building Member | California [Member]
Real Estate Acquired Through Foreclosure	1,700,000	13,200,000
Number of Real Estate Properties	3	12
Office And Commercial Use Building Member | Texas Member
Real Estate Acquired Through Foreclosure	14,400,000
Number of Real Estate Properties	4
Commercial Construction Loans [Member] | California [Member]
Real Estate Acquired Through Foreclosure	740,000	3,500,000
Number of Real Estate Properties	1	2
Commercial Construction Loans [Member] | Texas Member
Real Estate Acquired Through Foreclosure	1,300,000	2,400,000
Number of Real Estate Properties	2	3
Commercial Construction Loans [Member] | Washington State Member
Real Estate Acquired Through Foreclosure	870,000	658,000
Number of Real Estate Properties	1
Residential Construction [Member] | California [Member]
Real Estate Acquired Through Foreclosure	530,000	588,000
Number of Real Estate Properties	1	1
Single Family Residential Loan Member | California [Member]
Real Estate Acquired Through Foreclosure	179,000	395,000
Number of Real Estate Properties	1	2
Single Family Residential Loan Member | Texas Member
Real Estate Acquired Through Foreclosure	169,000	959,000
Number of Real Estate Properties	1	3
Single Family Residential Loan Member | Washington State Member
Real Estate Acquired Through Foreclosure		531,000
Number of Real Estate Properties		3
Single Family Residential Loan Member | All Other States [Member]
Real Estate Acquired Through Foreclosure		878,000
Number of Real Estate Properties		4
Nonresidential Land [Member] | Texas Member
Real Estate Acquired Through Foreclosure	1,100,000
Number of Real Estate Properties	1
Nonresidential Land [Member] | Washington State Member
Real Estate Acquired Through Foreclosure	733,000
Number of Real Estate Properties	1
Commercial Use Building [Member] | Texas Member
Real Estate Acquired Through Foreclosure		33,500,000
Number of Real Estate Properties		8
Commercial Use Building [Member] | New York State Member
Real Estate Acquired Through Foreclosure	1,200,000
Commercial Use Building [Member] | Nevada [Member]
Real Estate Acquired Through Foreclosure	1,100,000	1,300,000
Number of Real Estate Properties		1
Commercial Use Building [Member] | All Other States [Member]
Real Estate Acquired Through Foreclosure		2,100,000
Number of Real Estate Properties		3
Commercial Land [Member] | California [Member]
Real Estate Acquired Through Foreclosure		4,800,000
Number of Real Estate Properties		4
Retail Site [Member] | Washington State Member
Real Estate Acquired Through Foreclosure		1,600,000
Number of Real Estate Properties		2
California [Member]
Real Estate Acquired Through Foreclosure	12,200,000	32,300,000
Texas Member
Real Estate Acquired Through Foreclosure	29,600,000	48,600,000
Washington State Member
Real Estate Acquired Through Foreclosure	1,600,000	3,900,000
Nevada [Member]
Real Estate Acquired Through Foreclosure		4,800,000
All Other States [Member]
Real Estate Acquired Through Foreclosure	$ 752,000	$ 3,000,000