Allowance for Credit Losses (Non-Accrual Loans and Leases and Loans and Leases Past Due) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	$ 37,441,951	$ 26,155,981
Non-Accrual	74,371	30,702
GNMA Loans past due by 90 days, but not yet repurchased	1,000
Greater than 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	40,014	26,764
60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	45,221	38,129
90 Days or More and Accruing
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	39,542	34,556
Total Past Due
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	124,777	99,449
Current and Other
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	37,242,803	26,025,830
Commercial Real Estate Portfolio Segment
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	19,454,480	13,026,576
Commercial Real Estate Portfolio Segment | Non-owner occupied term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	6,482,940	3,894,840
Non-Accrual	4,359	2,963
Commercial Real Estate Portfolio Segment | Owner occupied term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	5,195,605	2,567,761
Non-Accrual	24,330	2,048
Commercial Real Estate Portfolio Segment | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	5,704,734	5,285,791
Non-Accrual	0	0
Commercial Real Estate Portfolio Segment | Construction & development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,747,302	1,077,346
Non-Accrual	0	0
Commercial Real Estate Portfolio Segment | Residential development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	323,899	200,838
Non-Accrual	0	0
Commercial Real Estate Portfolio Segment | Greater than 30 to 59 Days Past Due | Non-owner occupied term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,270	811
Commercial Real Estate Portfolio Segment | Greater than 30 to 59 Days Past Due | Owner occupied term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	3,078	168
Commercial Real Estate Portfolio Segment | Greater than 30 to 59 Days Past Due | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	0
Commercial Real Estate Portfolio Segment | Greater than 30 to 59 Days Past Due | Construction & development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	0
Commercial Real Estate Portfolio Segment | Greater than 30 to 59 Days Past Due | Residential development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	0
Commercial Real Estate Portfolio Segment | 60 to 89 Days Past Due | Non-owner occupied term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	3,312	538
Commercial Real Estate Portfolio Segment | 60 to 89 Days Past Due | Owner occupied term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	2,191	50
Commercial Real Estate Portfolio Segment | 60 to 89 Days Past Due | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	0
Commercial Real Estate Portfolio Segment | 60 to 89 Days Past Due | Construction & development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	0
Commercial Real Estate Portfolio Segment | 60 to 89 Days Past Due | Residential development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	0
Commercial Real Estate Portfolio Segment | 90 Days or More and Accruing | Non-owner occupied term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	437	0
Commercial Real Estate Portfolio Segment | 90 Days or More and Accruing | Owner occupied term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	433	1
Commercial Real Estate Portfolio Segment | 90 Days or More and Accruing | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	0
Commercial Real Estate Portfolio Segment | 90 Days or More and Accruing | Construction & development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	0
Commercial Real Estate Portfolio Segment | 90 Days or More and Accruing | Residential development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	0
Commercial Real Estate Portfolio Segment | Total Past Due | Non-owner occupied term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	5,019	1,349
Commercial Real Estate Portfolio Segment | Total Past Due | Owner occupied term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	5,702	219
Commercial Real Estate Portfolio Segment | Total Past Due | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	0
Commercial Real Estate Portfolio Segment | Total Past Due | Construction & development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	0
Commercial Real Estate Portfolio Segment | Total Past Due | Residential development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	0
Commercial Real Estate Portfolio Segment | Current and Other | Non-owner occupied term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	6,473,562	3,890,528
Commercial Real Estate Portfolio Segment | Current and Other | Owner occupied term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	5,165,573	2,565,494
Commercial Real Estate Portfolio Segment | Current and Other | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	5,704,734	5,285,791
Commercial Real Estate Portfolio Segment | Current and Other | Construction & development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,747,302	1,077,346
Commercial Real Estate Portfolio Segment | Current and Other | Residential development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	323,899	200,838
Commercial Portfolio Segment
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	9,696,404	5,695,773
Commercial Portfolio Segment | Term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	5,536,765	3,029,547
Non-Accrual	14,519	5,303
Commercial Portfolio Segment | Lines of credit & other, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	2,430,127	960,054
Non-Accrual	2,760	0
Commercial Portfolio Segment | Leases & equipment finance, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,729,512	1,706,172
Non-Accrual	28,403	20,388
Commercial Portfolio Segment | Greater than 30 to 59 Days Past Due | Term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	6,341	1,241
Commercial Portfolio Segment | Greater than 30 to 59 Days Past Due | Lines of credit & other, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,647	514
Commercial Portfolio Segment | Greater than 30 to 59 Days Past Due | Leases & equipment finance, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	22,217	19,929
Commercial Portfolio Segment | 60 to 89 Days Past Due | Term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	2,101	1,489
Commercial Portfolio Segment | 60 to 89 Days Past Due | Lines of credit & other, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,137	419
Commercial Portfolio Segment | 60 to 89 Days Past Due | Leases & equipment finance, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	24,178	23,288
Commercial Portfolio Segment | 90 Days or More and Accruing | Term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	202	19
Commercial Portfolio Segment | 90 Days or More and Accruing | Lines of credit & other, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	66	4
Commercial Portfolio Segment | 90 Days or More and Accruing | Leases & equipment finance, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	7,965	7,886
Commercial Portfolio Segment | Total Past Due | Term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	8,644	2,749
Commercial Portfolio Segment | Total Past Due | Lines of credit & other, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	2,850	937
Commercial Portfolio Segment | Total Past Due | Leases & equipment finance, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	54,360	51,103
Commercial Portfolio Segment | Current and Other | Term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	5,513,602	3,021,495
Commercial Portfolio Segment | Current and Other | Lines of credit & other, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	2,424,517	959,117
Commercial Portfolio Segment | Current and Other | Leases & equipment finance, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,646,749	1,634,681
Residential Portfolio Segment
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	8,095,332	7,279,000
Residential Portfolio Segment | Mortgage, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	6,157,166	5,647,035
Non-Accrual	0	0
Residential Portfolio Segment | Home equity loans & lines, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,938,166	1,631,965
Non-Accrual	0	0
Residential Portfolio Segment | Greater than 30 to 59 Days Past Due | Mortgage, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	282	847
Residential Portfolio Segment | Greater than 30 to 59 Days Past Due | Home equity loans & lines, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	4,401	2,808
Residential Portfolio Segment | 60 to 89 Days Past Due | Mortgage, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	9,410	10,619
Residential Portfolio Segment | 60 to 89 Days Past Due | Home equity loans & lines, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	2,373	1,526
Residential Portfolio Segment | 90 Days or More and Accruing | Mortgage, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	26,331	24,943
Residential Portfolio Segment | 90 Days or More and Accruing | Mortgage, net | GNMA Loans
Financing Receivable, Past Due [Line Items]
GNMA Loans past due by 90 days, but not yet repurchased	1,000	6,600
Residential Portfolio Segment | 90 Days or More and Accruing | Home equity loans & lines, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	3,782	1,569
Residential Portfolio Segment | Total Past Due | Mortgage, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	36,023	36,409
Residential Portfolio Segment | Total Past Due | Home equity loans & lines, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	10,556	5,903
Residential Portfolio Segment | Current and Other | Mortgage, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	6,121,143	5,610,626
Residential Portfolio Segment | Current and Other | Home equity loans & lines, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,927,610	1,626,062
Consumer Portfolio Segment
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	195,735	154,632
Non-Accrual	0	0
Consumer Portfolio Segment | Greater than 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	778	446
Consumer Portfolio Segment | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	519	200
Consumer Portfolio Segment | 90 Days or More and Accruing
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	326	134
Consumer Portfolio Segment | Total Past Due
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,623	780
Consumer Portfolio Segment | Current and Other
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	$ 194,112	$ 153,852