Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2021	Dec. 31, 2020
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	62,298,000	61,861,000
Common stock, shares outstanding	58,012,000	57,739,000
Treasury stock, shares	4,286,000	4,122,000