Dividends (Tables)

12 Months Ended

Dec. 31, 2012

Dividends [Abstract]

Dividends declared and paid

2012
Date Declared	Record Date	Payment Date	Dividend per     Share
January 31, 2012	February 10, 2012	February 15, 2012	$	0.06
April 19, 2012	April 30, 2012	May 15, 2012		0.06
July 19, 2012	July 30, 2012	August 15, 2012		0.06
October 18 , 2012	October 31, 2012	November 15, 2012		0.06
Total			$	0.24

2011
Date Declared	Record Date	Payment Date	Dividend per     Share
January 21, 2011	February 1, 2011	February 15, 2011	$	0.05
April 21, 2011	May 2, 2011	May 13, 2011		0.05
July 21, 2011	August 1, 2011	August 15, 2011		0.05
October 25, 2011	November 4, 2011	November 15, 2011		0.06
Total			$	0.21

2010
Date Declared	Record Date	Payment Date	Dividend per     Share
January 22, 2010	February 1, 2010	February 15, 2010	$	0.05
April 20, 2010	May 3, 2010	May 14, 2010		0.05
July 19, 2010	July 29, 2010	August 13, 2010		0.05
October 18, 2010	November 1, 2010	November 15, 2010		0.05
Total			$	0.20