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, 2016 |
Jun. 30, 2015 |
Jun. 30, 2016 |
Jun. 30, 2015 |
|
| Earnings Per Share [Abstract] | ||||
| Net income attributable to the Company | $ 102,149 | $ 93,347 | $ 154,650 | $ 130,979 |
| Less: dividends and undistributed earnings allocated to unvested restricted stock units (“RSUs”) | 88 | 150 | ||
| Net income allocated to common stockholders | $ 102,149 | $ 93,259 | $ 154,650 | $ 130,829 |
| Basic weighted-average shares | 110,480 | 108,459 | 110,327 | 108,102 |
| Effect of dilutive employee stock options and RSUs | 498 | 1,337 | 515 | 1,484 |
| Diluted weighted-average shares | 110,978 | 109,796 | 110,842 | 109,586 |
| Basic | $ 0.92 | $ 0.86 | $ 1.40 | $ 1.21 |
| Diluted | $ 0.92 | $ 0.85 | $ 1.40 | $ 1.19 |