Years Ended December 31,

2018

2017

2016

(in thousands, except per share amounts)

Net income available to common stockholders

$

60,352

$

43,220

$

31,060

Earnings allocated to participating securities

(139)

(141)

(147)

Income attributable to common stock

$

60,213

$

43,079

$

30,913

Weighted average common shares outstanding, including participating securities

32,198

31,943

30,453

Weighted average participating securities

(74)

(41)

(54)

Weighted average common shares outstanding

32,124

31,902

30,399

Incremental shares from assumed conversions of options, performance units and restricted shares

233

335

291

Weighted average common and equivalent shares outstanding

32,357

32,237

30,690

Earnings per common share:

Basic

$

1.87

$

1.35

$

1.02

Diluted

1.86

1.34

1.01