Earnings Per Share (Reconciliation) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
|
| Earnings Per Share, Basic [Abstract] | ||
| Net income | $ 61,022 | $ 71,655 |
| Net income attributable to non-controlling interests | 0 | (76) |
| Non-forfeitable dividends on unvested restricted shares | (56) | (10) |
| Net income attributable to the Company’s common stockholders for basic earnings per share | $ 60,966 | $ 71,569 |
| Weighted average number shares outstanding – basic (in shares) | 304,158 | 304,569 |
| Net income (usd per share) | $ 0.20 | $ 0.23 |
| Computation of Diluted Earnings Per Share: | ||
| Net income attributable to the Company’s common stockholders for diluted earnings per share | $ 60,966 | $ 71,569 |
| Equity awards (in shares) | 120 | 226 |
| Weighted average shares outstanding - diluted (in shares) | 304,278 | 304,795 |
| Net income (usd per share) | $ 0.20 | $ 0.23 |