CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares shares in Thousands	Mar. 31, 2016	Dec. 31, 2015
CONSOLIDATED BALANCE SHEETS
Common stock, par value	$ 0	$ 0
Common stock, shares authorized	500,000	500,000
Common, shares issued	277,022	274,421
Common, shares outstanding	277,022	274,421
Exchangeable, shares issued	21,054	24,213
Exchangeable, shares outstanding	21,054	24,213