Stockholders' Equity - Number of Shares (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Reconciliation of the number of shares outstanding with the number of shares used in computing basic and diluted earnings per share
Common shares outstanding, end of period	35,760	35,774	35,760	35,774
Effect of using weighted average common shares outstanding	60	79	59	192
Shares used in computing earnings per share-basic	35,820	35,853	35,819	35,966
Effect of shares issuable under stock option plans based on the treasury stock method	28	32	26	39
Effect of restricted and contingently issuable shares	69	87	65	73
Shares used in computing earnings per share-diluted	35,917	35,972	35,910	36,078