Dividends (Details)	12 Months Ended
	Dec. 31, 2012	Feb. 27, 2009
Dividends (Textual)
Cumulative dividend rate for first five years	5.00%	5.00%
Cumulative dividend rate after first five years	9.00%	9.00%
Description of dividend distribution	On January 15, 2013, the Company's Board of Directors approved a ten percent stock dividend to the Company's shareholders. The record date was February 1, 2013 and the distribution date was February 15, 2013. On January 17, 2012, the Company's Board of Directors also approved a ten percent stock dividend to the Company's shareholders. The record date was February 3, 2012 and the distribution date was February 17, 2012.