Nine Months Ended

September 30,

Three Months Ended

September 30,

2012

2011

2012

2011

Numerator:

Net income

$

47,044

$

55,854

$

6,708

$

6,306

Dividends on Series B Preferred

(240

)

(240

)

—

Dividends on Series D Preferred

(60

)

(60

)

—

Dividends on Noncumulative Preferred

—

(5

)

—

Total dividends on preferred stocks

(300

)

(305

)

—

Numerator for basic net income per common share - net income applicable to common stock

46,744

55,549

6,708

6,306

Dividends on preferred stocks assumed to be converted, if dilutive

300

305

—

Interest expense including amortization of debt issuance costs, net of income taxes, on convertible debt assumed to be converted, if dilutive

—

298

—

8

Numerator for diluted net income per common share

$

47,044

$

56,152

$

6,708

$

6,314

Denominator:

Denominator for basic net income per common share - weighted-average shares

22,346,112

21,851,184

22,373,731

22,240,536

Effective of dilutive securities:

Convertible preferred stocks

917,119

935,540

916,666

935,366

Stock options

264,965

345,245

261,341

317,420

Convertible notes payable

—

366,894

—

32,391

Dilutive potential common shares

1,182,084

1,647,679

1,178,007

1,285,177

Denominator for diluted net income per common share - adjusted weighted-average shares and assumed conversions

23,528,196

23,498,863

23,551,738

23,525,713

Basic net income per common share

$

2.09

$

2.54

$

0.30

$

0.28

Diluted net income per common share

$

2.00

$

2.39

$

0.28

$

0.27