Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2022

Stockholders' Equity Note [Abstract]

Rollforward of Common Stock Issued and Outstanding

The following table is a summary of changes in common shares issued and outstanding:

Year ended December 31,	2022	2021	2020
(thousands of shares)
Beginning balance	44,445	50,811	44,148
Issuance of shares	—	—	6,777
Repurchase of shares	(1,051)	(6,579)	(406)
Exercise of options and issuance of restricted stock awards	324	213	292
Ending balance	43,718	44,445	50,811