PSB HOLDINGS, INC. ACQUISITION OF MARATHON STATE BANK (Details1) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Pro Forma with Marathon State Bank
Net Interest Income	$ 5,163	$ 4,867	$ 14,859	$ 14,497
Noninterest Income	1,444	1,367	5,009	3,961
Net Income	1,226	1,394	4,324	3,905
Earnings Per Share	$ 0.74	$ 0.85	$ 2.60	$ 2.36
Pro Forma with Marathon State Bank
Pro Forma with Marathon State Bank
Net Interest Income	5,163	5,304	15,534	15,813
Noninterest Income	1,444	1,376	5,027	3,996
Net Income	1,226	1,516	470	4,316
Earnings Per Share	$ 0.74	$ 0.92	$ 2.63	$ 2.61
Marathon State Bank
Pro Forma with Marathon State Bank
Net Interest Income	350	437	1,158	1,316
Noninterest Income	8	9	880	35
Net Income	(132)	122	468	411
Earnings Per Share	$ (0.08)	$ 0.08	$ 0.28	$ 0.25
PSB Holdings, Inc.
Pro Forma with Marathon State Bank
Net Interest Income	4,813	4,867	14,376	14,497
Noninterest Income	1,436	1,367	4,147	3,961
Net Income	$ 1,358	$ 1,394	$ 3,902	$ 3,905
Earnings Per Share	$ 0.82	$ 0.84	$ 2.35	$ 2.36