Portfolio Loans -Summary of portfolio loans that are past due and still accruing or on a non-accrual status (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Portfolio loans	$ 7,670,114	$ 7,188,998
90 days past due and still accruing	1,229	906
Non-accrual Loans	15,425	15,946
30 to 59 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Portfolio loans	4,426	3,964
60 to 89 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Portfolio loans	1,881	2,297
Commercial
Financing Receivable, Past Due [Line Items]
Portfolio loans	1,945,893	1,943,886
90 days past due and still accruing	625	213
Non-accrual Loans	6,227	7,004
Commercial | 30 to 59 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Portfolio loans	19	363
Commercial | 60 to 89 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Portfolio loans	45	10
Commercial real estate
Financing Receivable, Past Due [Line Items]
Portfolio loans	3,278,684	3,119,807
90 days past due and still accruing	349	0
Non-accrual Loans	5,792	5,973
Commercial real estate | 30 to 59 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Portfolio loans	411	151
Commercial real estate | 60 to 89 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Portfolio loans	0	441
Real estate construction
Financing Receivable, Past Due [Line Items]
Portfolio loans	499,560	385,996
90 days past due and still accruing	0	0
Non-accrual Loans	48	0
Real estate construction | 30 to 59 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Portfolio loans	0	56
Real estate construction | 60 to 89 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Portfolio loans	0	0
Retail real estate
Financing Receivable, Past Due [Line Items]
Portfolio loans	1,643,099	1,512,976
90 days past due and still accruing	255	693
Non-accrual Loans	3,240	2,898
Retail real estate | 30 to 59 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Portfolio loans	3,734	3,312
Retail real estate | 60 to 89 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Portfolio loans	1,831	1,830
Retail other
Financing Receivable, Past Due [Line Items]
Portfolio loans	302,878	226,333
90 days past due and still accruing	0	0
Non-accrual Loans	118	71
Retail other | 30 to 59 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Portfolio loans	262	82
Retail other | 60 to 89 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Portfolio loans	$ 5	$ 16