CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - $ / shares	3 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021
CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
Common stock, par value (in dollars per share)	$ 0.01		$ 0.01
Issuance of restricted share awards under long-term equity incentive plan (in shares)		52,940		30,284
Repurchase of shares (in shares)	409,312	238,154	73,747	49,284
Number of shares withheld to pay taxes on employees' equity awards (in shares)	51	53,073	50	43,290
Shares issued upon exercise of stock options (in shares)		12,269		51,915