Common Equity - Changes in outstanding common shares (Details) - Common Stock - shares	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Common Equity
Beginning balance	20,416,908	20,310,584
Treasury stock purchases	(304,136)	(114,925)
Common stock issued (including share-based compensation impact)	205,598	448,674
Ending balance	20,318,370	20,644,333