Consolidated Balance Sheets (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Consolidated Balance Sheets [Abstract]
Common stock, no par value	$ 0	$ 0
Common stock, shares authorized	unlimited	unlimited
Common stock, shares issued	152,896,315	152,990,123
Common stock, shares outstanding	152,896,315	152,990,123