Foreign Currencies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schedule of Foreign Currency Balance [Line Items]
Investment subject to foreign currency fluctuations	$ 16,559,000
Cumulative foreign currency translation loss, net of deferred income tax benefit	(37,702,000)	$ (22,969,000)
Amount reclassified to net income	8,853,000
Income tax (benefit) expense	(54,205,000)	$ 37,283,000	$ 40,315,000
Foreign Currency Exchange Gain (Loss), Net
Schedule of Foreign Currency Balance [Line Items]
Income tax (benefit) expense	$ 0