CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012
SHAREHOLDERS' EQUITY:
Common stock, no par value (in dollars per share)	$ 0	$ 0
Common stock, authorized (in shares)	150,000,000	150,000,000
Common stock, issued (in shares)	96,335,050	95,844,012
Common stock, outstanding (in shares)	96,335,050	95,844,012