Note 2 - Recent Events (Detail) (USD $)	3 Months Ended	9 Months Ended			3 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Aug. 03, 2012 Transactional Deposits [Member] Waukegan Savings Bank [Member]	Aug. 03, 2012 Time Deposits [Member] Waukegan Savings Bank [Member]	Sep. 30, 2012 Waukegan Savings Bank [Member]	Aug. 03, 2012 Waukegan Savings Bank [Member]
Business Combination, Bargain Purchase, Gain Recognized, Amount	$ 3,289,000	$ 3,289,000			$ 3,300,000
Business Acquisition, Purchase Price Allocation, Other Noncurrent Assets						46,300,000
Business Acquisition, Purchase Price Allocation, Current Liabilities, Other Liabilities			72,700,000	41,500,000		31,200,000
Business Acquisition, Purchase Price Allocation, Intangible Assets Other than Goodwill						$ 781,000