Comprehensive Income Attributable to Noncontrolling Shareholders' Interests - Comprehensive Income Attributable to Noncontrolling Shareholders' Interests (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Stockholders' Equity [Abstract]
Net income attributable to noncontrolling shareholders' interests	$ 6,938	$ 3,469	$ 19,808	$ 16,340
Other comprehensive income:
Currency translation adjustments	(1,081)	327	(2,054)	2,078
Comprehensive income attributable to noncontrolling shareholders' interests	$ 5,857	$ 3,796	$ 17,754	$ 18,418