Share-Based Compensation - Restricted shares based on performance conditions (Details) - $ / shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Performance based restricted stock units
Share-Based Compensation
Vesting period	3 years
Restricted shares outstanding
Outstanding at the beginning of the period (in shares))	103,000
Granted (in shares)	92,761	60,633	49,065
Vested (in shares)	(44,000)
Forfeited (in shares)	(4,000)
Outstanding at the end of the period (in shares)	148,000	103,000
Weighted-Average Grant-Date Fair Value
Outstanding at the beginning of the period (in dollars per share)	$ 92.84
Granted (in dollars per share)	81.36
Vested (in dollars per share)	81.14
Forfeited (in dollars per share)	38.37
Outstanding at the end of the period (in dollars per share)	$ 73.36	$ 92.84
Performance based restricted stock units | Minimum
Share-Based Compensation
Vesting percentage	30.00%
Performance based restricted stock units | Maximum
Share-Based Compensation
Vesting percentage	200.00%
Performance based restricted shares
Restricted shares outstanding
Granted (in shares)	5,356