Condensed Parent Company Only Financial Statements (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended												12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities:
Net income	$ 1,561	$ 13	$ 1,561	$ 1,609	$ 1,685	$ 1,226	$ 1,918	$ 1,180	$ 1,400	$ 1,394	$ 1,226	$ 1,285	$ 4,744	$ 6,009	$ 5,305
Adjustments to reconcile net income to net cash provided by operating activities:
Net cash provided by operating activities													13,034	7,556	9,657
Cash flows from investing activities:
Net cash provided by investing activities													(25,570)	20,283	(7,782)
Financing activities:
Repayment of senior subordinated notes													(3,000)
Proceeds from exercise of stock options														9	45
Dividends declared													(1,289)	(1,247)	(1,168)
Purchase of treasury stock													(269)	(262)
Net cash used in financing activities													(4,789)	(17,197)	(4,001)
Net (decrease)/increase in cash and cash equivalents													(17,325)	10,642	(2,126)
The Corporation
Cash flows from operating activities:
Net income													4,744	6,009	5,305
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in undistributed net income of Peoples State Bank													(1,202)	801	(3,057)
(Increase) decrease in other assets													147	(21)	5
(Decrease) increase in other liabilities													(79)	(2)	28
(Decrease) increase in dividends payable													644	(583)	20
Net cash provided by operating activities													4,254	6,204	2,301
Cash flows from investing activities:
Purchase Marathon State Bank Common Stock													(19)	(5,482)
Investment in Peoples State Bank														(5)
Net cash provided by investing activities													(19)	(5,487)
Financing activities:
Repayment of senior subordinated notes													(3,000)
Proceeds from other borrowings													2,000
Repayments of other borrowings													(500)
Proceeds from exercise of stock options														9	45
Dividends declared													(1,289)	(1,247)	(1,168)
Purchase of treasury stock													(269)	(262)
Net cash used in financing activities													(3,058)	(1,500)	(1,123)
Net (decrease)/increase in cash and cash equivalents													1,177	(783)	1,178
Cash and cash equivalents at beginning of year				2,325				3,108				1,930	2,325	3,108	1,930
Cash and cash equivalents at end of year	$ 3,502				$ 2,325				$ 3,108				$ 3,502	$ 2,325	$ 3,108