XML 16 R112.htm IDEA: XBRL DOCUMENT v2.4.0.8
Earnings Per Share (Schedule of Earnings Per Share, Basic and Diluted) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Earnings Per Share, Basic and Dilutive [Line Items]                      
Net income $ 50,958 $ 56,181 $ 120,113 $ 26,031 $ 36,397 $ (7,829) $ 18,759 $ 10,471 $ 253,283 $ 57,798 $ 86,248
Interest on convertible subordinated debentures (net of income tax benefit)                 0 517 1,034
Numerator for earnings per common share—assuming dilution                 $ 253,283 $ 58,315 $ 87,282
Weighted average common shares outstanding (shares)                 65,543,895 [1] 61,258,825 [1] 59,482,349 [1]
Effect of dilutive securities: 2015 warrants (shares)                 1,184,549 0 0
Effect of dilutive securities: stock options and deferred compensation agreements (shares)                 1,224,053 553,312 561,898
Denominator for earnings per common share - assuming dilution (shares)                 75,040,646 65,675,651 63,619,495
Earnings per common share $ 0.73 $ 0.86 $ 1.87 $ 0.41 $ 0.58 $ (0.13) $ 0.31 $ 0.18 $ 3.86 $ 0.94 $ 1.45
Earnings per common share - assuming dilution $ 0.65 $ 0.75 $ 1.71 $ 0.38 $ 0.55 $ (0.13) $ 0.30 $ 0.16 $ 3.38 $ 0.89 $ 1.37
Convertible Subordinated Debentures [Member]
                      
Earnings Per Share, Basic and Dilutive [Line Items]                      
Effect of dilutive securities: conversion of debt securities (shares)                 0 1,348,447 2,727,084
Convertible Senior Notes [Member]
                      
Earnings Per Share, Basic and Dilutive [Line Items]                      
Effect of dilutive securities: conversion of debt securities (shares)                 7,088,149 2,515,067 848,164
[1] Weighted average common shares outstanding include shares vested under the NMO Deferred Compensation Plan and exclude unallocated shares held by the ESOP.