Unaudited Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2022	Dec. 31, 2021
Statement Of Financial Position [Abstract]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	62,514,000	62,298,000
Common stock, shares outstanding	57,864,000	58,012,000
Treasury stock, shares	4,650,000	4,286,000