Condensed Consolidated Balance Sheets (Parenthetical) - shares	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Statement of Financial Position [Abstract]
Common shares, shares authorized (shares)	63,000,000	63,000,000	63,000,000
Common shares, shares issued (shares)	34,064,000	34,064,000	34,064,000
Preferred shares, shares authorized (shares)	1,000,000	1,000,000	1,000,000
Preferred shares, shares issued (shares)	0	0	0
Treasury shares, at cost (shares)	289,000	446,000	61,000