Earnings Per Share (Schedule of Earnings Per Share) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Net income attributable to the Company	$ 107,320	$ 75,542	$ 261,970	$ 206,520
Less: dividends and undistributed earnings allocated to unvested restricted stock units (“RSUs”)	0	68	0	230
Net income allocated to common stockholders	$ 107,320	$ 75,474	$ 261,970	$ 206,290
Basic weighted-average shares	110,571	108,647	110,423	108,284
Effect of dilutive employee stock options and RSUs	680	1,357	583	1,422
Diluted weighted-average shares	111,251	110,004	111,006	109,706
Basic	$ 0.97	$ 0.69	$ 2.37	$ 1.91
Diluted	$ 0.96	$ 0.69	$ 2.36	$ 1.88