Information with Respect to Ordinary Shares that were Surrendered, Repurchased or Redeemed (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2015 shares
Equity, Class of Treasury Stock [Line Items]
Redeemed number of shares	4,555,061
Number of shares went in to liquidating trust	3,372,943
Ordinary Shares B
Equity, Class of Treasury Stock [Line Items]
B ordinary shares converted to A ordinary shares	7,928,004