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Securities Available for Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 1,415,959	$ 547,711
Gross Unrealized Gains	25,455	28,395
Gross Unrealized Losses	(13,737)	(506)
Fair Value	1,427,677	575,600
U.S. Treasury and U.S. government sponsored entities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	93,137	11,798
Gross Unrealized Gains	32	101
Gross Unrealized Losses	(2,338)	(54)
Fair Value	90,831	11,845
State and political subdivisions
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	636,724	344,160
Gross Unrealized Gains	23,296	22,350
Gross Unrealized Losses	(1,205)	(204)
Fair Value	658,815	366,306
Mortgage-backed securities - residential
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	663,405	157,106
Gross Unrealized Gains	1,875	4,919
Gross Unrealized Losses	(10,094)	(243)
Fair Value	655,186	161,782
Collateralized mortgage obligations
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	13,303	25,654
Gross Unrealized Gains	153	742
Gross Unrealized Losses	(71)	(3)
Fair Value	13,385	26,393
Corporate bonds
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	4,009	3,582
Gross Unrealized Gains	50	132
Gross Unrealized Losses	(29)	(2)
Fair Value	4,030	3,712
Small Business Administration
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	5,381	5,411
Gross Unrealized Gains	49	151
Gross Unrealized Losses	0	0
Fair Value	$ 5,430	$ 5,562

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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