Earnings Per Share (Schedule of Earnings Per Share) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Net income attributable to the Company	$ 155,140	$ 122,257	$ 231,367	$ 180,539
Basic weighted-average shares	112,556	111,549	112,406	111,374
Effect of dilutive employee stock options and restricted stock units (“RSUs”)	561	650	687	652
Diluted weighted-average shares	113,117	112,199	113,093	112,026
Basic	$ 1.38	$ 1.10	$ 2.06	$ 1.62
Diluted	$ 1.37	$ 1.09	$ 2.05	$ 1.61