PSB HOLDINGS, INC. ACQUISITION OF MARATHON STATE BANK (Details) (USD $) In Thousands, unless otherwise specified			0 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Jun. 14, 2012 Marathon State Bank
Accounting date			Jun. 01, 2012
Cash purchase price	$ 5,505		$ 5,505
Cash and due from banks	9,856	20,332	20,392
Securities			50,547
Loans receivable	492,588	477,991	23,760
Short-term commercial paper and bankers' acceptances			11,713
Foreclosed assets
Premises and equipment, net	9,990	10,240	402
Core deposit intangible asset
Accrued interest receivable and other assets			550
Total fair value of assets acquired	107,000		107,364
Non-interest-bearing	74,552	89,819	23,255
Interest-bearing	456,621	475,623	77,611
Accrued expenses and other liabilities	5,557	6,493	142
Total fair value of liabilities assumed			101,008
Fair value of net assets acquired			6,356
Gain on bargain purchase			$ 851