Benefit Plans - Stock Options Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Shares
Outstanding at beginning of year (in shares)	2,927,031	217,555	2,986,347
Acquired in business combinations (in shares)	0	2,726,113	0
Exercised (in shares)	(12,202)	(16,637)	(2,768,792)
Forfeited or expired (in shares)	0	0	0
Outstanding at end of year (in shares)	2,914,829	2,927,031	217,555
Exercisable at year-end (in shares)	2,914,829	2,927,031	217,555
Weighted Average Exercise Price
Outstanding at beginning of year (in USD per share)	$ 8	$ 7	$ 7
Acquired in business combinations (in USD per share)	0	8	0
Exercised (in USD per share)	6	6	7
Forfeited or expired (in USD per share)	0	0	0
Outstanding at end of year (in USD per share)	8	8	7
Exercisable at year-end (in USD per share)	$ 8	$ 8	$ 7