CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]
Common stock, no par value	$ 0	$ 0
Common stock, shares issued (shares)	170,671,457	168,726,984
Common stock, shares outstanding (shares)	170,671,457	168,726,984