Goodwill and Other Intangibles - Schedule of Goodwill Carrying Value (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Roll Forward]
Balance at beginning of year	$ 369,477	$ 369,031
Goodwill recorded during the year (1)	262,019	446
Goodwill disposed of during the year	0	0
Balance at end of year	631,496	369,477
Banking Business
Goodwill [Roll Forward]
Balance at beginning of year	298,611	298,611
Goodwill recorded during the year (1)	259,024	0
Goodwill disposed of during the year	0	0
Balance at end of year	557,635	298,611
Insurance Agency Business
Goodwill [Roll Forward]
Balance at beginning of year	70,866	70,420
Goodwill recorded during the year (1)	2,995	446
Goodwill disposed of during the year	0	0
Balance at end of year	$ 73,861	$ 70,866