Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share (Schedule Of Earnings Per Share Reconciliation) (Details)

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Earnings Per Share (Schedule Of Earnings Per Share Reconciliation) (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Earnings Per Share [Abstract]        
Basic, Net income $ 502,000 $ 29,009,000 $ 52,488,000 $ 77,448,000
Diluted, Net income $ 502,000 $ 29,009,000 $ 52,488,000 $ 77,448,000
Basic, Shares 55,692,664 50,407,240 55,658,507 47,549,672
Effect of dilutive securities, Stock options and restricted stock awards, Shares 599,128 498,722 516,074 458,696
Diluted, Shares 56,291,792 50,905,962 56,174,581 48,008,368
Basic, Net income Per Share $ 0.01 $ 0.58 $ 0.94 $ 1.63
Diluted, Net income Per Share $ 0.01 $ 0.57 $ 0.93 $ 1.61