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Per Share Information (Basic And Diluted Earnings Per Share) (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011
NET INCOME: |  |  |  |
Net income attributable to common stock | $ 96,398 | $ 51,994 | $ 207,643 | $ 66,201
WEIGHTED AVERAGE SHARES: |  |  |  |
Weighted average shares outstanding for basic earnings per share | 213,150 | 210,583 | 212,564 | 213,400
Effect of dilutive stock options | 92 | 109 | 86 | 128
Effect of shares in escrow |  |  |  | 527
Weighted average shares outstanding for diluted earnings per share | 213,242 | 210,692 | 212,650 | 214,055

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