PSB HOLDINGS, INC. ACQUISITION OF MARATHON STATE BANK (Details) (USD $) In Thousands, unless otherwise specified			6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012 Marathon State Bank
Accounting date			Jun. 01, 2012
Cash purchase price	$ 5,505		$ 5,505
Cash and due from banks	33,248	14,805	20,392
Securities			50,547
Loans receivable	466,330	437,557	23,760
Short-term commercial paper and bankers' acceptances			11,713
Foreclosed assets			0
Premises and equipment, net	10,191	9,928	402
Core deposit intangible asset			0
Accrued interest receivable and other assets			550
Total fair value of assets acquired	107,364		107,364
Non-interest-bearing	82,909	75,298	23,255
Interest-bearing	474,498	406,211	77,611
Accrued expenses and other liabilities	11,043	6,449	142
Total fair value of liabilities assumed			101,008
Fair value of net assets acquired			6,356
Gain on bargain purchase			$ 851