(Dollars and number of shares in thousands, except per share data)

2019

2018

2017

Net income attributable to Heartland

$

149,129

$

116,998

$

75,272

Preferred dividends

—

(39)

(58)

Interest expense on convertible preferred debt

—

12

Net income available to common stockholders

$

149,129

$

116,959

$

75,226

Weighted average common shares outstanding for basic earnings per share

35,991

33,012

28,168

Assumed incremental common shares issued upon vesting of restricted stock units

71

201

258

Weighted average common shares for diluted earnings per share

36,062

33,213

28,426

Earnings per common share — basic

$

4.14

$

3.54

$

2.67

Earnings per common share — diluted

$

4.14

$

3.52

$

2.65