Earnings Per Share (Details Textual) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 Series B Preferred Stock [Member]	Dec. 31, 2013 Convertible preferred stock [Member]	Dec. 31, 2011 Convertible preferred stock [Member]	Dec. 31, 2013 Stock Options [Member]	Dec. 31, 2011 Stock Options [Member]
Earnings Per Share (Textual) [Abstract]
Common stock issuable on conversion (in shares)	0.9	5.1	5.1	1.2	0.1