Performance Incentive Plan (Other Grants) (Details)	12 Months Ended
	Dec. 31, 2023 $ / shares shares
Other share grants under the 2017 Plan:
Restricted shares granted (in shares)	33,400
Restricted shares granted, weighted average share price (in dollars per share) | $ / shares	$ 41.48
Shares available under the 2017 Plan for grant, end of period (in shares)	4,761,552
Directors’ fees
Other share grants under the 2017 Plan:
Restricted shares granted (in shares)	12,344
Restricted shares granted, weighted average share price (in dollars per share) | $ / shares	$ 41.42
Deferred directors’ fees
Other share grants under the 2017 Plan:
Restricted shares granted (in shares)	21,056
Restricted shares granted, weighted average share price (in dollars per share) | $ / shares	$ 41.51