Years Ended December 31,

($ in thousands, except per share data)

2022

2021

2020

Numerator:

Net income (loss) to common shareholders

$

524,089

$

463,215

$

(45,174

)

Net income or dividends allocated to participating securities - basic
   and diluted

7,620

9,134

1,756

Net income (loss) allocated to common shareholders - basic and diluted

$

516,469

$

454,081

$

(46,930

)

Denominator:

Weighted-average common shares - basic

86,068

86,823

86,533

Dilutive potential common shares

326

204

—

Weighted average common shares - diluted

86,394

87,027

86,533

Earnings (loss) per common share:

Basic

$

6.00

$

5.23

$

(0.54

)

Diluted

$

5.98

$

5.22

$

(0.54

)