Common Stock Dividend (Details) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended			6 Months Ended		0 Months Ended
	Jun. 25, 2013	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jul. 12, 2013 Subsequent Event [Member]
Subsequent Event [Line Items]
Additional number of shares issued to shareholders (in shares)			142,157				143,613
Common stock dividend issued	1.00%
Amount transferred from retained earnings to common stocks based on closing price on declaration date	$ 603		$ 619
Closing price of common stock on declaration date (in dollars per share)	$ 4.20
Percentage of stock dividend declared on common stocks outstanding (in hundredths)	1.00%	1.00%		1.00%	1.00%	1.00%
Common stock dividend declared			1.00%