Related Party Transactions (Details) (Directors, their affiliates and executive officers [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Directors, their affiliates and executive officers [Member]
Summary of loan transactions with directors, including their affiliates and executive officers
Balance, beginning of year	$ 16,968	$ 18,147
New loans	14,081	12,717
Less loan payments	(13,645)	(13,896)
Balance, end of year	$ 17,404	$ 16,968