Allowance for Credit Losses (Non-Accrual Loans and Leases and Loans and Leases Past Due) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	$ 37,091,280	$ 26,155,981
Non-Accrual	57,913	30,702
Allowance for credit loss on non-accrual loans	30,400	17,500
GNMA Loans past due by 90 days, but not yet repurchased	5,400
Greater than 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	50,828	26,764
60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	27,813	38,129
90 Days or More and Accruing
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	23,117	34,556
Total Past Due
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	101,758	99,449
Current and Other
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	36,931,609	26,025,830
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	19,009,213	13,026,576
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Non-owner Occupied Term [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	6,353,550	3,894,840
Non-Accrual	4,016	2,963
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied Term [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	5,156,848	2,567,761
Non-Accrual	11,596	2,048
Commercial Real Estate Portfolio Segment [Member] | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	5,590,587	5,285,791
Non-Accrual	0	0
Commercial Real Estate Portfolio Segment [Member] | Construction & development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,467,561	1,077,346
Non-Accrual	0	0
Commercial Real Estate Portfolio Segment [Member] | Residential development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	440,667	200,838
Non-Accrual	0	0
Commercial Real Estate Portfolio Segment [Member] | 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	2,929	811
Commercial Real Estate Portfolio Segment [Member] | Greater than 30 to 59 Days Past Due | Commercial Real Estate, Owner Occupied Term [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,190	168
Commercial Real Estate Portfolio Segment [Member] | 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 [Member] | 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 [Member] | 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 [Member] | 60 to 89 Days Past Due | Commercial Real Estate, Non-owner Occupied Term [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	683	538
Commercial Real Estate Portfolio Segment [Member] | 60 to 89 Days Past Due | Commercial Real Estate, Owner Occupied Term [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	738	50
Commercial Real Estate Portfolio Segment [Member] | 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 [Member] | 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 [Member] | 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 [Member] | 90 Days or More and Accruing | Commercial Real Estate, Non-owner Occupied Term [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	0
Commercial Real Estate Portfolio Segment [Member] | 90 Days or More and Accruing | Commercial Real Estate, Owner Occupied Term [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1	1
Commercial Real Estate Portfolio Segment [Member] | 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 [Member] | 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 [Member] | 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 [Member] | Total Past Due | Commercial Real Estate, Non-owner Occupied Term [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	3,612	1,349
Commercial Real Estate Portfolio Segment [Member] | Total Past Due | Commercial Real Estate, Owner Occupied Term [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,929	219
Commercial Real Estate Portfolio Segment [Member] | Total Past Due | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	0
Commercial Real Estate Portfolio Segment [Member] | Total Past Due | Construction & development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	0
Commercial Real Estate Portfolio Segment [Member] | Total Past Due | Residential development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	0
Commercial Real Estate Portfolio Segment [Member] | Current and Other | Commercial Real Estate, Non-owner Occupied Term [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	6,345,922	3,890,528
Commercial Real Estate Portfolio Segment [Member] | Current and Other | Commercial Real Estate, Owner Occupied Term [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	5,143,323	2,565,494
Commercial Real Estate Portfolio Segment [Member] | Current and Other | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	5,590,587	5,285,791
Commercial Real Estate Portfolio Segment [Member] | Current and Other | Construction & development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,467,561	1,077,346
Commercial Real Estate Portfolio Segment [Member] | Current and Other | Residential development, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	440,667	200,838
Commercial
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	9,837,803	5,695,773
Commercial | Term [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	5,906,774	3,029,547
Non-Accrual	9,640	5,303
Commercial | Lines of credit & other, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	2,184,762	960,054
Non-Accrual	1,681	0
Commercial | Leases & equipment finance, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,746,267	1,706,172
Non-Accrual	30,980	20,388
Commercial | Greater than 30 to 59 Days Past Due | Term [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	3,451	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	1,996	514
Commercial | Greater than 30 to 59 Days Past Due | Leases & equipment finance, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	28,956	19,929
Commercial | 60 to 89 Days Past Due | Term [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,550	1,489
Commercial | 60 to 89 Days Past Due | Lines of credit & other, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,213	419
Commercial | 60 to 89 Days Past Due | Leases & equipment finance, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	16,253	23,288
Commercial | 90 Days or More and Accruing | Term [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	93	19
Commercial | 90 Days or More and Accruing | Lines of credit & other, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	58	4
Commercial | 90 Days or More and Accruing | Leases & equipment finance, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	0	7,886
Commercial | Total Past Due | Term [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	5,094	2,749
Commercial | Total Past Due | Lines of credit & other, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	3,267	937
Commercial | Total Past Due | Leases & equipment finance, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	45,209	51,103
Commercial | Current and Other | Term [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	5,892,040	3,021,495
Commercial | Current and Other | Lines of credit & other, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	2,179,814	959,117
Commercial | Current and Other | Leases & equipment finance, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,670,078	1,634,681
Residential
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	8,057,966	7,279,000
Residential | Mortgage, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	6,187,964	5,647,035
Non-Accrual	0	0
Residential | Home equity loans & lines, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,870,002	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	7,993	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	3,843	2,808
Residential | 60 to 89 Days Past Due | Mortgage, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	5,112	10,619
Residential | 60 to 89 Days Past Due | Home equity loans & lines, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	2,024	1,526
Residential | 90 Days or More and Accruing | Mortgage, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	20,867	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	5,400	6,600
Residential | 90 Days or More and Accruing | Home equity loans & lines, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,958	1,569
Residential | Total Past Due | Mortgage, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	33,972	36,409
Residential | Total Past Due | Home equity loans & lines, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	7,825	5,903
Residential | Current and Other | Mortgage, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	6,153,992	5,610,626
Residential | Current and Other | Home equity loans & lines, net
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	1,862,177	1,626,062
Consumer Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	186,298	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	470	446
Consumer Portfolio Segment [Member] | 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	240	200
Consumer Portfolio Segment [Member] | 90 Days or More and Accruing
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	140	134
Consumer Portfolio Segment [Member] | Total Past Due
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	850	780
Consumer Portfolio Segment [Member] | Current and Other
Financing Receivable, Past Due [Line Items]
Total Loans and Leases	$ 185,448	$ 153,852