Allowance for Credit Losses (Non-Accrual Loans and Leases and Loans and Leases Past Due) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	$ 37,049,299	$ 26,155,981
Non-Accrual	50,310	30,702
Allowance for credit loss on non-accrual loans	25,900	17,500
GNMA Loans past due by 90 days, but not yet repurchased	1,600
Greater than 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	36,186	26,764
60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	37,190	38,129
90 Days or More and Accruing
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	31,240	34,556
Total Past Due
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	104,616	99,449
Current and Other
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	36,894,373	26,025,830
Commercial real estate
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	19,229,514	13,026,576
Commercial real estate | Commercial Real Estate, Non-owner Occupied Term [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	6,434,673	3,894,840
Non-Accrual	3,689	2,963
Commercial real estate | Owner occupied term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	5,254,401	2,567,761
Non-Accrual	7,305	2,048
Commercial real estate | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	5,622,875	5,285,791
Non-Accrual	0	0
Commercial real estate | Construction & development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,528,924	1,077,346
Non-Accrual	0	0
Commercial real estate | Residential development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	388,641	200,838
Non-Accrual	0	0
Commercial real estate | Greater than 30 to 59 Days Past Due | Commercial Real Estate, Non-owner Occupied Term [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,397	811
Commercial real estate | Greater than 30 to 59 Days Past Due | Owner occupied term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	4,434	168
Commercial real estate | 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 | 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 | 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 | 60 to 89 Days Past Due | Commercial Real Estate, Non-owner Occupied Term [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	4,682	538
Commercial real estate | 60 to 89 Days Past Due | Owner occupied term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	446	50
Commercial real estate | 60 to 89 Days Past Due | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	0
Commercial real estate | 60 to 89 Days Past Due | Construction & development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	0
Commercial real estate | 60 to 89 Days Past Due | Residential development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	0
Commercial real estate | 90 Days or More and Accruing | Commercial Real Estate, Non-owner Occupied Term [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	70	0
Commercial real estate | 90 Days or More and Accruing | Owner occupied term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	114	1
Commercial real estate | 90 Days or More and Accruing | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	0
Commercial real estate | 90 Days or More and Accruing | Construction & development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	0
Commercial real estate | 90 Days or More and Accruing | Residential development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	0
Commercial real estate | Total Past Due | Commercial Real Estate, Non-owner Occupied Term [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	6,149	1,349
Commercial real estate | Total Past Due | Owner occupied term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	4,994	219
Commercial real estate | Total Past Due | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	0
Commercial real estate | Total Past Due | Construction & development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	0
Commercial real estate | Total Past Due | Residential development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	0
Commercial real estate | Current and Other | Commercial Real Estate, Non-owner Occupied Term [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	6,424,835	3,890,528
Commercial real estate | Current and Other | Owner occupied term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	5,242,102	2,565,494
Commercial real estate | Current and Other | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	5,622,875	5,285,791
Commercial real estate | Current and Other | Construction & development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,528,924	1,077,346
Commercial real estate | Current and Other | Residential development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	388,641	200,838
Commercial
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	9,458,614	5,695,773
Commercial | Term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	5,449,787	3,029,547
Non-Accrual	11,695	5,303
Commercial | Lines of credit & other, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	2,268,790	960,054
Non-Accrual	1,664	0
Commercial | Leases & equipment finance, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,740,037	1,706,172
Non-Accrual	25,957	20,388
Commercial | Greater than 30 to 59 Days Past Due | Term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,584	1,241
Commercial | Greater than 30 to 59 Days Past Due | Lines of credit & other, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	7,184	514
Commercial | Greater than 30 to 59 Days Past Due | Leases & equipment finance, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	15,655	19,929
Commercial | 60 to 89 Days Past Due | Term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	2,073	1,489
Commercial | 60 to 89 Days Past Due | Lines of credit & other, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	510	419
Commercial | 60 to 89 Days Past Due | Leases & equipment finance, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	19,316	23,288
Commercial | 90 Days or More and Accruing | Term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	13	19
Commercial | 90 Days or More and Accruing | Lines of credit & other, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	71	4
Commercial | 90 Days or More and Accruing | Leases & equipment finance, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	7,636	7,886
Commercial | Total Past Due | Term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	3,670	2,749
Commercial | Total Past Due | Lines of credit & other, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	7,765	937
Commercial | Total Past Due | Leases & equipment finance, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	42,607	51,103
Commercial | Current and Other | Term, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	5,434,422	3,021,495
Commercial | Current and Other | Lines of credit & other, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	2,259,361	959,117
Commercial | Current and Other | Leases & equipment finance, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,671,473	1,634,681
Residential
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	8,171,856	7,279,000
Residential | Mortgage, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	6,272,898	5,647,035
Non-Accrual	0	0
Residential | Home equity loans & lines, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,898,958	1,631,965
Non-Accrual	0	0
Residential | Greater than 30 to 59 Days Past Due | Mortgage, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	847	847
Residential | Greater than 30 to 59 Days Past Due | Home equity loans & lines, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	4,115	2,808
Residential | 60 to 89 Days Past Due | Mortgage, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	8,504	10,619
Residential | 60 to 89 Days Past Due | Home equity loans & lines, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,414	1,526
Residential | 90 Days or More and Accruing | Mortgage, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	19,525	24,943
Residential | 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	1,600	6,600
Residential | 90 Days or More and Accruing | Home equity loans & lines, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	3,412	1,569
Residential | Total Past Due | Mortgage, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	28,876	36,409
Residential | Total Past Due | Home equity loans & lines, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	8,941	5,903
Residential | Current and Other | Mortgage, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	6,244,022	5,610,626
Residential | Current and Other | Home equity loans & lines, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,890,017	1,626,062
Consumer Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	189,315	154,632
Non-Accrual	0	0
Consumer Portfolio Segment [Member] | Greater than 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	970	446
Consumer Portfolio Segment [Member] | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	245	200
Consumer Portfolio Segment [Member] | 90 Days or More and Accruing
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	399	134
Consumer Portfolio Segment [Member] | Total Past Due
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,614	780
Consumer Portfolio Segment [Member] | Current and Other
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	$ 187,701	$ 153,852