Transactions with related parties (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Balance at beginning of year	$ 128	$ 594
Additions	1,431	368
Repayments	(142)	(834)
Retirement of Board member	(11)	0
Balance at end of year	$ 1,406	$ 128