CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2015	Dec. 31, 2014
SHAREHOLDERS' EQUITY
Series A convertible preferred stock, par value (in dollars per share)	$ 0	$ 0
Series A convertible preferred stock, authorized (in shares)	2,000,000	2,000,000
Series A convertible preferred stock, issued (in shares)	0	70,000
Series A convertible preferred stock outstanding (in shares)	0	70,000
Common shares, par value (in dollars per share)	$ 0	$ 0
Common shares, authorized (in shares)	125,000,000	125,000,000
Common shares, issued (in shares)	94,894,140	83,121,698
Common shares, outstanding (in shares)	90,421,554	78,227,756
Treasury stock (in shares)	4,472,586	4,893,942