Benefit Plans - Changes in RSUs Outstanding (Details) - RSUs - shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Changes in Director's Restricted Stock Awards
Outstanding at beginning of year (in shares)	3,889,756	3,228,659	2,158,255
Granted (in shares)	3,426,181	1,999,376	2,030,026
Vested (in shares)	(1,833,739)	(1,239,797)	(879,085)
Forfeited (in shares)	(285,589)	(98,482)	(80,537)
Outstanding at end of year (in shares)	5,196,609	3,889,756	3,228,659