Earnings Per Share (Schedule of Earnings Per Share) (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share [Abstract]
Net income attributable to the Company	$ 50,594	$ 34,672	$ 72,318	$ 70,850
Less: dividends and undistributed earnings allocated to unvested restricted stock units (“RSUs”)	123	47	176	100
Net income allocated to common stockholders	$ 50,471	$ 34,625	$ 72,142	$ 70,750
Basic weighted-average shares	106,878	108,210	106,522	107,881
Effect of dilutive employee stock options and RSUs	1,769	2,101	1,901	2,191
Diluted weighted-average shares	108,647	110,311	108,423	110,072
Basic	$ 0.47	$ 0.32	$ 0.68	$ 0.66
Diluted	$ 0.47	$ 0.31	$ 0.67	$ 0.64