Fair Value Measurements, Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Assets, Fair Value Disclosure [Abstract]
Cash and Due from Banks	$ 574,698	$ 544,059
Interest-Bearing Deposits in Banks and Other Financial Institutions	1,144,123	453,590
Debt Securities, Available-for-sale	5,397,563	4,581,434
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	3,602,576	3,738,747
Debt Securities, Held-to-Maturity, Fair Value	3,190,994	3,185,494
Equity Securities, FV-NI and without Readily Determinable Fair Value	26,060	23,242
FHLB and Federal Reserve Bank stocks	252,514	179,665
Loans and Leases Receivable, Net Amount	30,785,546	29,405,041
Life Insurance, Corporate or Bank Owned, Amount	694,452	689,000
Assets	45,202,596	43,023,068
Liabilities, Fair Value Disclosure [Abstract]
Noninterest-bearing Domestic Deposit, Demand	6,126,632	5,775,657
Deposits, Savings Deposits	5,471,870	5,133,295
Deposits, Money Market Deposits	6,139,438	6,009,793
Time Deposits	7,836,311
Deposits	35,552,608	34,648,434
Federal Funds Purchased and Securities Sold under Agreements to Repurchase	307,864	470,369
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	3,268,094	1,853,807
Other Long-Term Debt	594,276	837,635
Liabilities	40,227,249	38,417,506
Standby Letters of Credit [Member]
Liabilities, Fair Value Disclosure [Abstract]
Other Commitment	222,047	253,709
Interest Rate Contract [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets	19,286	31,950
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	1,833	1,452
Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash and Due from Banks	574,698	544,059
Interest-Bearing Deposits in Banks and Other Financial Institutions	1,144,123	453,590
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	1,400	21,955
Equity Securities, FV-NI	11,060	10,742
Equity Securities, FV-NI and without Readily Determinable Fair Value	26,060	23,242
FHLB and Federal Reserve Bank stocks	252,514	179,665
Loan, Mortgage, Held-for-Sale, Fair Value Disclosure	72,499	646,687
Loan, Held-for-Sale, Fair Value Disclosure		32,634
Loans and Leases Receivable, Net Amount	30,766,886	29,373,557
Loans Receivable, Fair Value Disclosure	29,970,788	28,327,115
Life Insurance, Corporate or Bank Owned, Amount	694,452	689,000
Servicing Asset	86,337	87,683
Assets	42,699,714	40,471,048
Assets, Fair Value Disclosure	41,492,034	38,871,352
Liabilities, Fair Value Disclosure [Abstract]
Brokered CDs, Carrying Amount	3,795,133	4,276,309
Brokered CDs, Fair Value	3,791,245	4,276,309
Time Deposits, at Carrying Value	4,041,178	3,700,518
Time Deposits	4,035,549	3,700,518
Federal Funds Purchased and Securities Sold under Agreements to Repurchase	307,864	470,369
Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	307,864	470,370
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	3,268,094	1,853,807
Federal Home Loan Bank Borrowings, Fair Value Disclosure	3,267,836	1,852,685
Other Long-Term Debt	594,276	837,635
Long-term Debt, Fair Value	598,141	823,991
Long-term Line of Credit	2,225	2,546
Liabilities	12,119,557	11,319,757
Liabilities, Fair Value Disclosure	12,113,647	11,304,992
Fair Value, Recurring [Member] \| Commitments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets		254
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	444
Fair Value, Recurring [Member] \| Interest Rate Lock Commitments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets	814	327
Fair Value, Recurring [Member] \| Designated as Hedging Instrument [Member] \| Interest Rate Contract [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets	10,517	2,960
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	1	2,976
Fair Value, Recurring [Member] \| Designated as Hedging Instrument [Member] \| Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure	757	2,457
Liabilities, Fair Value Disclosure [Abstract]
Foreign Currency Contracts, Liability, Fair Value Disclosure	194	563
Fair Value, Recurring [Member] \| Not Designated as Hedging Instrument [Member] \| Interest Rate Contract [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets	66,787	88,541
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	108,631	170,928
Fair Value, Recurring [Member] \| Not Designated as Hedging Instrument [Member] \| Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure	1,731	4,315
Liabilities, Fair Value Disclosure [Abstract]
Foreign Currency Contracts, Liability, Fair Value Disclosure	1,517	4,106
US Treasury Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	996	1,000
Debt Securities, Held-to-Maturity, Fair Value	1,015	999
US Treasury Securities [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	996	1,000
Debt Securities, Held-to-Maturity, Fair Value	1,015	999
US States and Political Subdivisions Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	3,044	3,005
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,628,088	1,659,722
Debt Securities, Held-to-Maturity, Fair Value	1,507,302	1,486,642
US States and Political Subdivisions Debt Securities [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	3,044	3,005
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,628,088	1,659,662
Debt Securities, Held-to-Maturity, Fair Value	1,507,302	1,486,582
Residential Mortgage-Backed Securities [Member] \| US Government Sponsored-Enterprise Insured Loans [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	129,863	110,928
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	823,630	885,476
Debt Securities, Held-to-Maturity, Fair Value	696,462	721,946
Residential Mortgage-Backed Securities [Member] \| Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	5,039,829	4,227,727
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	39,123	43,693
Debt Securities, Held-to-Maturity, Fair Value	36,884	39,927
Residential Mortgage-Backed Securities [Member] \| Fair Value, Recurring [Member] \| US Government Sponsored-Enterprise Insured Loans [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	129,863	110,928
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	823,630	885,476
Debt Securities, Held-to-Maturity, Fair Value	696,462	721,946
Residential Mortgage-Backed Securities [Member] \| Fair Value, Recurring [Member] \| Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	5,039,829	4,227,727
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	39,123	43,693
Debt Securities, Held-to-Maturity, Fair Value	36,884	39,927
Residential Mortgage-Backed Securities [Member] \| Fair Value, Recurring [Member] \| Mortgage-Backed Securities, Issued by Private Enterprises [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	302,817	324,182
Debt Securities, Held-to-Maturity, Fair Value	258,827	266,353
Commercial Mortgage-Backed Securities [Member] \| US Government Sponsored-Enterprise Insured Loans [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	16,958	17,000
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	763,370	772,456
Debt Securities, Held-to-Maturity, Fair Value	650,366	623,595
Commercial Mortgage-Backed Securities [Member] \| Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	109,556	111,475
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	44,552	52,219
Debt Securities, Held-to-Maturity, Fair Value	40,138	46,032
Commercial Mortgage-Backed Securities [Member] \| Fair Value, Recurring [Member] \| US Government Sponsored-Enterprise Insured Loans [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	16,958	17,000
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	763,370	772,456
Debt Securities, Held-to-Maturity, Fair Value	650,366	623,595
Commercial Mortgage-Backed Securities [Member] \| Fair Value, Recurring [Member] \| Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	109,556	111,475
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	44,552	52,219
Debt Securities, Held-to-Maturity, Fair Value	40,138	46,032
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	95,046	107,839
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0
Debt Securities, Held-to-Maturity, Fair Value	0
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	95,046	107,839
US Government-sponsored Enterprises Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	269	471
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0
Debt Securities, Held-to-Maturity, Fair Value	0
US Government-sponsored Enterprises Debt Securities [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	269	471
Other Debt And Other Equity Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	2,998	2,989
Other Debt And Other Equity Securities [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	2,998	2,989
Available-for-Sale Securities [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	5,397,563	4,581,434
Held-to-Maturity Securities [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	3,602,576	3,738,687
Debt Securities, Held-to-Maturity, Fair Value	3,190,994	3,185,434
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash and Due from Banks	574,698	544,059
Interest-Bearing Deposits in Banks and Other Financial Institutions	1,144,123	453,590
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	1,400	21,955
Equity Securities, FV-NI	11,060	10,670
FHLB and Federal Reserve Bank stocks	0	0
Loan, Mortgage, Held-for-Sale, Fair Value Disclosure	0	0
Loan, Held-for-Sale, Fair Value Disclosure		0
Loans Receivable, Fair Value Disclosure	0	0
Life Insurance, Corporate or Bank Owned, Amount	0	0
Servicing Asset	0	0
Assets, Fair Value Disclosure	1,732,296	1,031,273
Liabilities, Fair Value Disclosure [Abstract]
Brokered CDs, Fair Value	0	0
Time Deposits	0	0
Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	307,864	0
Federal Home Loan Bank Borrowings, Fair Value Disclosure	0	0
Long-term Debt, Fair Value	0	0
Long-term Line of Credit	0	0
Liabilities, Fair Value Disclosure	307,864	0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Commitments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets		0
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Interest Rate Lock Commitments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets	0	0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Designated as Hedging Instrument [Member] \| Interest Rate Contract [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets	0	0
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	0	0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Designated as Hedging Instrument [Member] \| Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure [Abstract]
Foreign Currency Contracts, Liability, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Not Designated as Hedging Instrument [Member] \| Interest Rate Contract [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets	0	0
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	0	0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Not Designated as Hedging Instrument [Member] \| Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure [Abstract]
Foreign Currency Contracts, Liability, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member] \| US Treasury Securities [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Fair Value	1,015	999
Fair Value, Inputs, Level 1 [Member] \| US States and Political Subdivisions Debt Securities [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 1 [Member] \| Residential Mortgage-Backed Securities [Member] \| Fair Value, Recurring [Member] \| US Government Sponsored-Enterprise Insured Loans [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 1 [Member] \| Residential Mortgage-Backed Securities [Member] \| Fair Value, Recurring [Member] \| Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 1 [Member] \| Residential Mortgage-Backed Securities [Member] \| Fair Value, Recurring [Member] \| Mortgage-Backed Securities, Issued by Private Enterprises [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 1 [Member] \| Commercial Mortgage-Backed Securities [Member] \| Fair Value, Recurring [Member] \| US Government Sponsored-Enterprise Insured Loans [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 1 [Member] \| Commercial Mortgage-Backed Securities [Member] \| Fair Value, Recurring [Member] \| Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 1 [Member] \| Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	0	0
Fair Value, Inputs, Level 1 [Member] \| US Government-sponsored Enterprises Debt Securities [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	0	0
Fair Value, Inputs, Level 1 [Member] \| Other Debt And Other Equity Securities [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	0	0
Fair Value, Inputs, Level 1 [Member] \| Available-for-Sale Securities [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	0	0
Fair Value, Inputs, Level 1 [Member] \| Held-to-Maturity Securities [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Fair Value	1,015	999
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash and Due from Banks	0	0
Interest-Bearing Deposits in Banks and Other Financial Institutions	0	0
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	0	0
Equity Securities, FV-NI	0	0
FHLB and Federal Reserve Bank stocks	252,514	179,665
Loan, Mortgage, Held-for-Sale, Fair Value Disclosure	72,499	646,687
Loan, Held-for-Sale, Fair Value Disclosure		32,634
Loans Receivable, Fair Value Disclosure	0	0
Life Insurance, Corporate or Bank Owned, Amount	694,452	689,000
Servicing Asset	0	0
Assets, Fair Value Disclosure	9,686,799	9,412,129
Liabilities, Fair Value Disclosure [Abstract]
Brokered CDs, Fair Value	3,791,245	4,276,309
Time Deposits	4,035,549	3,700,518
Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	0	470,370
Federal Home Loan Bank Borrowings, Fair Value Disclosure	3,267,836	1,852,685
Long-term Debt, Fair Value	598,141	823,991
Long-term Line of Credit	2,225	2,546
Liabilities, Fair Value Disclosure	11,805,339	11,304,992
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets	1,731	4,315
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	1,517	4,106
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Commitments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets		0
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	0
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Interest Rate Lock Commitments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets	0	0
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Designated as Hedging Instrument [Member] \| Interest Rate Contract [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets	10,517	2,960
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	1	2,976
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Designated as Hedging Instrument [Member] \| Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets	757	2,457
Foreign Currency Contract, Asset, Fair Value Disclosure	757	2,457
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	194	563
Foreign Currency Contracts, Liability, Fair Value Disclosure	194	563
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Not Designated as Hedging Instrument [Member] \| Interest Rate Contract [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets	66,787	88,541
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	108,631	170,928
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Not Designated as Hedging Instrument [Member] \| Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure	1,731	4,315
Liabilities, Fair Value Disclosure [Abstract]
Foreign Currency Contracts, Liability, Fair Value Disclosure	1,517	4,106
Fair Value, Inputs, Level 2 [Member] \| US Treasury Securities [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 2 [Member] \| US States and Political Subdivisions Debt Securities [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	3,044	3,005
Debt Securities, Held-to-Maturity, Fair Value	1,507,302	1,486,582
Fair Value, Inputs, Level 2 [Member] \| Residential Mortgage-Backed Securities [Member] \| Fair Value, Recurring [Member] \| US Government Sponsored-Enterprise Insured Loans [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	129,863	110,928
Debt Securities, Held-to-Maturity, Fair Value	696,462	721,946
Fair Value, Inputs, Level 2 [Member] \| Residential Mortgage-Backed Securities [Member] \| Fair Value, Recurring [Member] \| Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	5,039,829	4,227,727
Debt Securities, Held-to-Maturity, Fair Value	36,884	39,927
Fair Value, Inputs, Level 2 [Member] \| Residential Mortgage-Backed Securities [Member] \| Fair Value, Recurring [Member] \| Mortgage-Backed Securities, Issued by Private Enterprises [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Fair Value	258,827	266,353
Fair Value, Inputs, Level 2 [Member] \| Commercial Mortgage-Backed Securities [Member] \| Fair Value, Recurring [Member] \| US Government Sponsored-Enterprise Insured Loans [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	16,958	17,000
Debt Securities, Held-to-Maturity, Fair Value	650,366	623,595
Fair Value, Inputs, Level 2 [Member] \| Commercial Mortgage-Backed Securities [Member] \| Fair Value, Recurring [Member] \| Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	109,556	111,475
Debt Securities, Held-to-Maturity, Fair Value	40,138	46,032
Fair Value, Inputs, Level 2 [Member] \| Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	95,046	107,839
Fair Value, Inputs, Level 2 [Member] \| US Government-sponsored Enterprises Debt Securities [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	269	471
Fair Value, Inputs, Level 2 [Member] \| Other Debt And Other Equity Securities [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	2,998	2,989
Fair Value, Inputs, Level 2 [Member] \| Available-for-Sale Securities [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	5,397,563	4,581,434
Fair Value, Inputs, Level 2 [Member] \| Held-to-Maturity Securities [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Fair Value	3,189,979	3,184,435
Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Equity Securities, FV-NI	0	72	$ 24,769
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash and Due from Banks	0	0
Interest-Bearing Deposits in Banks and Other Financial Institutions	0	0
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	0	0
Equity Securities, FV-NI	0	72
FHLB and Federal Reserve Bank stocks	0	0
Loan, Mortgage, Held-for-Sale, Fair Value Disclosure	0	0
Loan, Held-for-Sale, Fair Value Disclosure		0
Loans Receivable, Fair Value Disclosure	29,970,788	28,327,115
Life Insurance, Corporate or Bank Owned, Amount	0	0
Servicing Asset	86,337	87,683
Assets, Fair Value Disclosure	30,057,939	28,415,450
Liabilities, Fair Value Disclosure [Abstract]
Brokered CDs, Fair Value	0	0
Time Deposits	0	0
Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	0	0
Federal Home Loan Bank Borrowings, Fair Value Disclosure	0	0
Long-term Debt, Fair Value	0	0
Long-term Line of Credit	0	0
Liabilities, Fair Value Disclosure	444	0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Commitments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets		254
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	444
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Interest Rate Lock Commitments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets	814	327
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Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Not Designated as Hedging Instrument [Member] \| Interest Rate Lock Commitments [Member]
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Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 3 [Member] \| US States and Political Subdivisions Debt Securities [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
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Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 3 [Member] \| Residential Mortgage-Backed Securities [Member] \| Fair Value, Recurring [Member] \| Government National Mortgage Association (GNMA) [Member]
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Fair Value, Inputs, Level 3 [Member] \| Residential Mortgage-Backed Securities [Member] \| Fair Value, Recurring [Member] \| Mortgage-Backed Securities, Issued by Private Enterprises [Member]
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Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	0	0
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Debt Securities, Available-for-sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 3 [Member] \| Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	0	0
Fair Value, Inputs, Level 3 [Member] \| US Government-sponsored Enterprises Debt Securities [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	0	0
Fair Value, Inputs, Level 3 [Member] \| Other Debt And Other Equity Securities [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	0	0
Fair Value, Inputs, Level 3 [Member] \| Available-for-Sale Securities [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-sale	0	0
Fair Value, Inputs, Level 3 [Member] \| Held-to-Maturity Securities [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, NAV [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Equity Securities, FV-NI	$ 15,000	$ 12,500

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

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Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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Fair value portion of mortgage loans held-for-sale.

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Amount of money in noninterest-bearing domestic accounts that entitle the depositor to withdraw funds at any time without prior notice, also known as demand deposits.

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Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

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Aggregate amount of servicing assets that are subsequently measured at fair value and servicing assets that are subsequently measured using the amortization method.

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Amount of time deposit liabilities, including certificates of deposit.

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Any certificate of deposit or savings account held by a bank or other financial institution for a short-term specified period of time. Because of their short-term, time deposits are considered highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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