Fair Value Measurement (Schedule Of Carrying Value And Fair Value Of Financial Instruments Not Recorded At Fair Value) (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Financial assets:
Equity and other investment securities	$ 73,638		$ 72,959
Investment securities available for sale	8,503,986		3,196,166
Investment securities held to maturity	2,344		2,476
Loans held for sale	60,313		71,647
Loans and leases, net	36,754,038		25,854,846
Restricted equity securities	168,524		47,144
Residential mortgage servicing rights	117,640	$ 172,929	185,017	$ 196,177	$ 179,558	$ 123,615
Bank owned life insurance	648,232		331,759
Derivatives	769		15,444
Financial liabilities:
Securities sold under agreements to repurchase	258,383		308,769
Borrowings	3,985,000		906,175
Junior subordinated debentures, at fair value	331,545		323,639
Junior and other subordinated debentures, at amortized cost	107,952		87,813
Derivatives	403,821		271,205
Carrying Value
Financial assets:
Cash and cash equivalents	2,403,695		1,294,643
Equity and other investment securities	73,638		72,959
Investment securities available for sale	8,503,986		3,196,166
Investment securities held to maturity	2,344		2,476
Loans held for sale	60,313		71,647
Loans and leases, net	36,754,038		25,854,846
Restricted equity securities	168,524		47,144
Residential mortgage servicing rights	117,640		185,017
Bank owned life insurance	648,232		331,759
Derivatives	769		15,444
Financial liabilities:
Demand, money market, and savings deposits	35,799,702		24,355,381
Time Deposits	5,824,666		2,710,231
Securities sold under agreements to repurchase	258,383		308,769
Borrowings	3,985,000		906,175
Junior subordinated debentures, at fair value	331,545		323,639
Junior and other subordinated debentures, at amortized cost	107,952		87,813
Derivatives	403,821		271,205
Fair Value
Financial assets:
Cash and cash equivalents	2,403,695		1,294,643
Equity and other investment securities	73,638		72,959
Investment securities available for sale	8,503,986		3,196,166
Investment securities held to maturity	3,058		3,197
Loans held for sale	60,313		71,647
Loans and leases, net	35,285,963		24,399,370
Restricted equity securities	168,524		47,144
Residential mortgage servicing rights	117,640		185,017
Bank owned life insurance	648,232		331,759
Derivatives	769		15,444
Financial liabilities:
Demand, money market, and savings deposits	35,799,702		24,355,381
Time Deposits	5,783,410		2,667,535
Securities sold under agreements to repurchase	258,383		308,769
Borrowings	3,984,939		905,591
Junior subordinated debentures, at fair value	331,545		323,639
Junior and other subordinated debentures, at amortized cost	91,864		80,922
Derivatives	$ 403,821		$ 271,205