Loans and Allowance for Credit Losses - Age Analysis of Past Due Loans Segregated by Class of Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Total	$ 7,319,611	$ 7,183,969
Nonaccrual	14,319	19,052	$ 66,291
Current
Financing Receivable, Past Due [Line Items]
Total	7,297,351	7,144,576
Total Past Due Loans
Financing Receivable, Past Due [Line Items]
Total	22,260	39,393
30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	3,643	18,093
60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	4,298	2,248
Commercial Loans | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total	2,582,262	2,538,839
Nonaccrual	1,328	7,100	31,488
Commercial Loans | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total	1,425,483	1,510,392
Nonaccrual	2,652	283	15,239
Commercial Loans | Commercial construction
Financing Receivable, Past Due [Line Items]
Total	349,843	381,963
Nonaccrual	384	384	2,471
Commercial Loans | Business banking
Financing Receivable, Past Due [Line Items]
Total	1,290,871	1,205,944
Nonaccrual	3,529	4,490	9,641
Commercial Loans | Current | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total	2,580,469	2,523,315
Commercial Loans | Current | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total	1,422,831	1,505,805
Commercial Loans | Current | Commercial construction
Financing Receivable, Past Due [Line Items]
Total	349,459	381,579
Commercial Loans | Current | Business banking
Financing Receivable, Past Due [Line Items]
Total	1,284,602	1,199,586
Commercial Loans | Total Past Due Loans | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total	1,793	15,524
Commercial Loans | Total Past Due Loans | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total	2,652	4,587
Commercial Loans | Total Past Due Loans | Commercial construction
Financing Receivable, Past Due [Line Items]
Total	384	384
Commercial Loans | Total Past Due Loans | Business banking
Financing Receivable, Past Due [Line Items]
Total	6,269	6,358
Commercial Loans | 30-59 Days Past Due | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total	465	8,424
Commercial Loans | 30-59 Days Past Due | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total	0	4,304
Commercial Loans | 30-59 Days Past Due | Commercial construction
Financing Receivable, Past Due [Line Items]
Total	0	0
Commercial Loans | 30-59 Days Past Due | Business banking
Financing Receivable, Past Due [Line Items]
Total	1,437	1,583
Commercial Loans | 60-89 Days Past Due | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total	0	0
Commercial Loans | 60-89 Days Past Due | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total	0	0
Commercial Loans | 60-89 Days Past Due | Commercial construction
Financing Receivable, Past Due [Line Items]
Total	0	0
Commercial Loans | 60-89 Days Past Due | Business banking
Financing Receivable, Past Due [Line Items]
Total	1,303	285
Consumer Loans | Consumer real estate
Financing Receivable, Past Due [Line Items]
Total	1,555,521	1,421,953
Nonaccrual	6,059	6,526	7,294
Consumer Loans | Other consumer
Financing Receivable, Past Due [Line Items]
Total	115,631	124,878
Nonaccrual	367	269	$ 158
Consumer Loans | Current | Consumer real estate
Financing Receivable, Past Due [Line Items]
Total	1,544,967	1,409,907
Consumer Loans | Current | Other consumer
Financing Receivable, Past Due [Line Items]
Total	115,023	124,384
Consumer Loans | Total Past Due Loans | Consumer real estate
Financing Receivable, Past Due [Line Items]
Total	10,554	12,046
Consumer Loans | Total Past Due Loans | Other consumer
Financing Receivable, Past Due [Line Items]
Total	608	494
Consumer Loans | 30-59 Days Past Due | Consumer real estate
Financing Receivable, Past Due [Line Items]
Total	1,577	3,617
Consumer Loans | 30-59 Days Past Due | Other consumer
Financing Receivable, Past Due [Line Items]
Total	164	165
Consumer Loans | 60-89 Days Past Due | Consumer real estate
Financing Receivable, Past Due [Line Items]
Total	2,918	1,903
Consumer Loans | 60-89 Days Past Due | Other consumer
Financing Receivable, Past Due [Line Items]
Total	$ 77	$ 60