Transactions with Directors and Executive Officers (Details) (USD $)	12 Months Ended
	Dec. 31, 2012
Analysis of the changes in loans to related parties
Balance at beginning of year	$ 37,072,000
Addition due to change in relationship	1,233,000
Deletion due to change in relationship	(2,344,000)
New loans/ advances	4,437,000
Repayments	(10,684,000)
Balance at end of year	29,714,000
Directors and executive officers
Analysis of the changes in loans to related parties
Total unused commitments	$ 7,400,000