Loans and Allowance for Credit Losses (Aging of Past Due Financing Receivables) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	$ 2,753,223	$ 14,922
Nonaccrual	$ 3,481	1,908
Loans held for investment ($9,526 (2023) and $8,437 (2022), at fair value)		$ 2,556,107
Percent of total loans, Total past due		0.60%
Percent of total loans, Nonaccrual	0.10%	0.10%
Percent of total loans, Total loans		100.00%
Loans, net	$ 9,745	$ 8,437
PCI loans acquired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	$ 2,753,223
Loans held for investment ($9,526 (2023) and $8,437 (2022), at fair value)		$ 26,642
Percent of total loans, Total loans	100.00%	1.00%
Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	$ 2,742,780	$ 2,512,635
Percent of total loans, Current	99.70%	98.30%
Financial Asset, Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	$ 6,962
Percent of total loans, Total past due	0.20%
Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	$ 3,451	$ 11,164
Percent of total loans, Total past due	0.10%	0.40%
Financing Receivables, 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	$ 2,461	$ 1,917
Percent of total loans, Total past due	0.10%	0.10%
Financing Receivables, Equal to Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	$ 1,050	$ 1,841
Percent of total loans, Total past due		0.10%
Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	938,151	$ 8,212
Nonaccrual	2,733	1,259
Loans held for investment ($9,526 (2023) and $8,437 (2022), at fair value)		810,497
Residential real estate | PCI loans acquired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	938,151
Loans held for investment ($9,526 (2023) and $8,437 (2022), at fair value)		13,956
Residential real estate | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	932,852	787,070
Residential real estate | Financial Asset, Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	2,566
Residential real estate | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	574	6,214
Residential real estate | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,742	891
Residential real estate | Financing Receivables, Equal to Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	250	1,107
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,130,346	1,079
Nonaccrual	368	150
Loans held for investment ($9,526 (2023) and $8,437 (2022), at fair value)		1,065,409
Commercial real estate | PCI loans acquired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,130,346
Loans held for investment ($9,526 (2023) and $8,437 (2022), at fair value)		11,866
Commercial real estate | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,128,529	1,052,314
Commercial real estate | Financial Asset, Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,449
Commercial real estate | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	685	369
Commercial real estate | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	43
Commercial real estate | Financing Receivables, Equal to Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	721	710
Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	138,459	15
Nonaccrual	156	174
Loans held for investment ($9,526 (2023) and $8,437 (2022), at fair value)		147,856
Commercial | PCI loans acquired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	138,459
Loans held for investment ($9,526 (2023) and $8,437 (2022), at fair value)		156
Commercial | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	138,303	147,511
Commercial | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due		15
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	326,039	234
Nonaccrual	51	28
Loans held for investment ($9,526 (2023) and $8,437 (2022), at fair value)		286,026
Consumer | PCI loans acquired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	326,039
Loans held for investment ($9,526 (2023) and $8,437 (2022), at fair value)		14
Consumer | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	324,312	285,750
Consumer | Financial Asset, Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,676
Consumer | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,509	223
Consumer | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	167	11
Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	220,228
Construction | Commercial and Residential Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	220,228	5,382
Nonaccrual	173	297
Loans held for investment ($9,526 (2023) and $8,437 (2022), at fair value)		246,319
Construction | Commercial and Residential Real Estate | PCI loans acquired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	220,228
Loans held for investment ($9,526 (2023) and $8,437 (2022), at fair value)		650
Construction | Commercial and Residential Real Estate | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	218,784	239,990
Construction | Commercial and Residential Real Estate | Financial Asset, Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,271
Construction | Commercial and Residential Real Estate | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	683	4,343
Construction | Commercial and Residential Real Estate | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	509	1,015
Construction | Commercial and Residential Real Estate | Financing Receivables, Equal to Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	$ 79	$ 24