Redeemable Non-Controlling Interests - Activities of Company's Redeemable Non-Controlling Interests (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Noncontrolling Interest [Abstract]
Balance as of December 31, 2013			$ 123,902
Net loss attributable to redeemable non-controlling interests	(1,249)	529	(1,299)	970
Other comprehensive income attributable to redeemable non-controlling interests	750	(5,309)	2,817	(4,540)
Increase in redemption value of non-controlling interests			100,065
Impact of foreign currency translation			1,671
Balance as of June 30, 2014	$ 227,156		$ 227,156