Investment Securities (Available-for-sale Securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Schedule of Available-for-sale Securities
Amortized Cost	$ 839,682	$ 734,544
Gross Unrealized Gains	16,363	20,775
Gross Unrealized Losses	(6,408)	(2,306)
Available-for-sale securities	849,637	753,013
Gross Unrealized Gains	2,178	1,789
Securities Investment [Member]
Schedule of Available-for-sale Securities
Interest Receivable	4,300	2,700
U.S. government sponsored agencies
Schedule of Available-for-sale Securities
Amortized Cost	14,345	4,960
Gross Unrealized Gains	85	403
Gross Unrealized Losses	(195)	0
Available-for-sale securities	14,235	5,363
States and political subdivisions
Schedule of Available-for-sale Securities
Amortized Cost	221,354	110,401
Gross Unrealized Gains	4,212	4,642
Gross Unrealized Losses	(1,713)	(124)
Available-for-sale securities	223,853	114,919
Gross Unrealized Gains	1,079	510
Residential mortgage-backed securities
Schedule of Available-for-sale Securities
Amortized Cost	571,447	609,865
Gross Unrealized Gains	11,712	15,377
Gross Unrealized Losses	(4,007)	(2,024)
Available-for-sale securities	579,152	623,218
Gross Unrealized Gains	676	852
Commercial mortgage-backed securities
Schedule of Available-for-sale Securities
Amortized Cost	27,840	4,622
Gross Unrealized Gains	112	161
Gross Unrealized Losses	(321)	0
Available-for-sale securities	27,631	4,783
Gross Unrealized Gains	324	427
Bank-issued trust preferred securities
Schedule of Available-for-sale Securities
Amortized Cost	4,696	4,696
Gross Unrealized Gains	242	192
Gross Unrealized Losses	(172)	(158)
Available-for-sale securities	$ 4,766	$ 4,730

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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-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
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Amount, before tax, of unrealized loss 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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