Segment Information - Information about Company's Segments (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Taxable-equivalent adjustment	$ 14.3	$ 11.8	$ 41.7	$ 25.8
Average total assets	$ 204,266.0	187,395.0	$ 204,266.0	187,395.0	$ 190,252.0
Hospitality [Member]
Segment Reporting Information [Line Items]
Average total assets		$ 1,170.0		$ 1,170.0