Goodwill and Intangible Assets (Schedule of Goodwill and Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Goodwill and Intangible Assets [Roll Forward]
Total goodwill	$ 823,172
CDI current period amortization	(2,288)	$ (1,924)
Indefinite-lived Intangible Assets (Excluding Goodwill)	919	919
Other intangible assets, net	32,359	24,810	$ 34,647
Total goodwill and intangible assets, end of period	855,531	790,652
Core Deposits [Member]
Goodwill and Intangible Assets [Roll Forward]
Gross core deposit intangible balance, beginning of period			88,931	$ 105,473
Accumulated amortization at beginning of period			$ (55,203)	$ (79,658)
Core deposit intangible, net, beginning of period	33,728	25,815
CDI current period amortization	(2,288)	(1,924)
Total core deposit intangible, end of period	$ 31,440	$ 23,891