XML 42 R52.htm IDEA: XBRL DOCUMENT v2.4.0.6
Earnings Per Share (Computation Of Basic And Diluted Income Per Common Share) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Earnings Per Share [Abstract]                      
Net income $ 39,465 $ 41,777 $ 39,368 $ 37,417 $ 54,891 $ 93,320 $ 38,030 $ 19,194 $ 158,027 $ 205,435 $ 265,895
Basic common shares outstanding                 99,281 101,678 101,577
Stock options                 282 238 74
Unvested restricted stock                 813 692 707
Diluted common shares outstanding                 100,376 102,608 102,358
Basic income per common share $ 0.41 $ 0.42 $ 0.39 $ 0.37 $ 0.54 $ 0.92 $ 0.37 $ 0.19 $ 1.59 $ 2.02 $ 2.62
Diluted income per common share $ 0.40 $ 0.42 $ 0.39 $ 0.37 $ 0.54 $ 0.91 $ 0.37 $ 0.19 $ 1.57 $ 2.00 $ 2.60