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Earnings Per Share
 6 Months Ended
Jun. 30, 2013
Earnings Per Share [Abstract]  
Earnings Per Share [Text Block]
Earnings Per Share
The following table sets forth the computation of earnings per common share and earnings per common share - assuming dilution:
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
2013
 
2012
 
2013
 
2012
 
(Dollars in thousands, except per share data)
Numerator:
 
 
 
 
 
 
 
Net income - numerator for earnings per common share
$
120,113

 
$
18,759

 
$
146,144

 
$
29,230

Interest on convertible subordinated debentures (net of income tax benefit)
—

 
257

 
—

 
515

Numerator for earnings per common share - assuming dilution
$
120,113

 
$
19,016

 
$
146,144

 
$
29,745

 
 
 
 
 
 
 
 
Denominator:
 
 
 
 
 
 
 
Weighted average common shares outstanding (1)
64,254,387

 
59,943,337

 
63,786,577

 
59,821,937

Effect of dilutive securities:
 
 
 
 
 
 
 
Convertible subordinated debentures
—

 
2,637,176

 
—

 
2,678,508

Convertible senior notes
5,009,622

 
1,158,686

 
5,082,208

 
1,158,686

Stock options and deferred compensation agreements
1,118,056

 
514,429

 
1,013,455

 
570,525

Denominator for earnings per common share - assuming dilution
70,382,065

 
64,253,628

 
69,882,240

 
64,229,656

 
 
 
 
 
 
 
 
Earnings per common share
$
1.87

 
$
0.31

 
$
2.29

 
$
0.49

Earnings per common share - assuming dilution
$
1.71

 
$
0.30

 
$
2.09

 
$
0.46


_____________________________
(1)
Weighted average common shares outstanding include shares vested under the NMO Deferred Compensation Plan and exclude unallocated shares held by the ESOP.

Options to purchase shares of our common stock that were outstanding during the respective periods indicated but were not included in the computation of diluted earnings per share because the options' exercise price was greater than the average market price of the common shares are as follows:
Period
 
Number of
Shares
 
Range of
Exercise Prices
 
 
 
 
Minimum
 
Maximum
Three months ended June 30, 2013
 
—

 
$—
 
$—
Six months ended June 30, 2013
 
—

 
$—
 
$—
Three months ended June 30, 2012
 
1,502,900

 
$11.88
 
$14.34
Six months ended June 30, 2012
 
1,502,900

 
$11.88
 
$14.34