Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares issued	25,987,935	23,638,373
Common stock, shares outstanding	25,984,488	23,637,434