Comprehensive Income Attributable to Noncontrolling Shareholders' Interests - Comprehensive Income Attributable to Noncontrolling Shareholders' Interests (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Stockholders' Equity [Abstract]
Net income attributable to noncontrolling shareholders' interests	$ 23,244	$ 22,552	$ 32,055
Other comprehensive income:
Currency translation adjustments	(4,295)	3,205	2,143
Comprehensive income attributable to noncontrolling shareholders' interests	$ 18,949	$ 25,757	$ 34,198