Earnings Per Share (Details Textual)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Earnings Per Share (Textual) [Abstract]
Weighted average shares of non-vested restricted stock excluded from basic earnings per share	289,931	230,090	287,509	248,123