Three Months Ended

March 31,

2012

2011

Numerator:

Net income

$

14,303

$

20,903

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

14,003

20,598

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

—

265

Numerator for diluted net income per common share

$

14,303

$

21,168

Denominator:

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

22,323,780

21,179,800

Effect of dilutive securities:

Convertible preferred stocks

918,026

935,626

Stock options

281,714

355,681

Convertible notes payable

—

973,292

Dilutive potential common shares

1,199,740

2,264,599

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

23,523,520

23,444,399

Basic net income per common share

$

.63

$

.97

Diluted net income per common share

$

.61

$

.90