Reserve for Unfunded Commitments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Dec. 31, 2010
Summary of the activity in reserve for unfunded commitments
Balance at beginning of period	$ 2,550	$ 2,690	$ 2,740	$ 2,640
Provision for losses - unfunded commitments	40	(50)	(150)
Balance at end of period	$ 2,590	$ 2,640	$ 2,590	$ 2,640