Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2015	Dec. 31, 2014
Statement Of Financial Position [Abstract]
Common shares, par value	$ 0.001	$ 0.001
Common shares, shares authorized	1,000,000,000	1,000,000,000
Common shares, shares outstanding	92,700,000	92,200,000