Fair Value Measurements, Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financial assets
Cash and due from banks	$ 343,831	$ 416,154
Interest-bearing deposits in other financial institutions	681,684	298,759
Federal funds sold and securities purchased under agreements to resell	0	1,135
Debt Securities, Available-for-sale	541,305	3,085,441
Investment securities held to maturity	2,239,003	1,879,005
Investment securities held to maturity, fair value	2,348,664	2,028,943
Equity Securities with Readily Determined Fair Value	5,000	2,000
Equity Securities without Readily Determinable Fair Value, Amount	14,000	13,000
Equity securities	18,352	15,106
FHLB and Federal Reserve Bank stocks	168,281	168,280
Loans, net	23,944,934	24,068,022
Bank and Corporate Owned Life Insurance	680,021	679,647
Forward Commitment Fair Value	30
Financial liabilities
Short-term funding	354,262	252,317
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	1,621,047	1,632,723
Other long-term funding	1,870,371
Commitment on standby letters of credit	248,000	279,000
Fair Value, Inputs, Level 1
Financial assets
Cash and due from banks	343,831	416,154
Cash and due from banks, Fair Value	343,831	416,154
Interest-bearing deposits in other financial institutions	681,684	298,759
Interest-bearing deposits in other financial institutions, fair value	681,684	298,759
Federal funds sold and securities purchased under agreements to resell	0	1,135
Federal funds sold and securities purchased under agreements to resell, fair value	0	1,135
Debt Securities, Available-for-sale	122,957	26,531
Investment securities available for sale, at fair value	122,957	26,531
Investment securities held to maturity	1,000	999
Investment securities held to maturity, fair value	1,001	1,024
Equity securities with readily determinable fair value, Carrying Amount	4,810	1,661
Equity Securities with Readily Determined Fair Value	4,810	1,661
Fair Value, Inputs, Level 2
Financial assets
Debt Securities, Available-for-sale	4,209,058	3,058,910
Investment securities available for sale, at fair value	4,209,058	3,058,910
Investment securities held to maturity	2,237,947	1,877,939
Investment securities held to maturity, fair value	2,347,608	2,027,852
FHLB and Federal Reserve Bank stocks	168,281	168,280
FHLB and Federal Reserve Bank stocks, fair value	168,281	168,280
Residential Loans Receivable Held for sale Net Not Part of Disposal Group	136,638	129,158
Residential Held-for-sale, Fair Value Disclosure	136,638	129,158
Bank and Corporate Owned Life Insurance	680,021	679,647
Bank owned life insurance, fair value	680,021	679,647
Financial liabilities
Brokered CDs and other time deposits	1,347,262	1,757,030
Brokered CDs and other time deposits, fair value	1,347,262	1,766,200
Short-term funding	354,262	252,317
Short-term funding, fair value	354,248	252,303
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	1,621,047	1,632,723
Advances, Fair Value Disclosure	1,680,814	1,760,727
Other long-term funding	249,324	549,465
Long-term funding, fair value	265,545	578,233
Standby letters of credit	2,367	2,731
Standby letters of credit, fair value	2,367	2,731
Fair Value, Inputs, Level 2 \| Asset
Financial assets
Derivative Assets	90,379	209,913
Derivatives (trading and other assets), fair value	90,379	209,913
Fair Value, Inputs, Level 2 \| Liability
Financial liabilities
Net Amounts Presented on the Consolidated Balance Sheets	32,921	41,671
Derivatives (trading and other liabilities), fair value	32,921	41,671
Fair Value, Inputs, Level 3
Financial assets
Equity Securities without Readily Determinable Fair Value, Amount	13,542	13,444
Equity securities	13,542	13,444
Loans, net	23,944,934	24,068,022
Loans, net, fair value	23,980,330	24,012,738
Derivative Assets	2,617	9,624
Derivatives (trading and other assets), fair value	2,617	9,624
Forward Commitment Carrying Value	30	0
Forward Commitment Fair Value	30	0
Financial liabilities
Noninterest-bearing demand, savings, interest-bearing demand, and money market accounts	27,119,167	24,725,451
Noninterest-bearing demand, savings, interest-bearing demand, and money market accounts, fair value	27,119,167	24,725,451
Net Amounts Presented on the Consolidated Balance Sheets	0	2,046
Derivatives (trading and other liabilities), fair value	$ 0	$ 2,046

This element represents the portion of the balance sheet assertion valued at fair value by the entity 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. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

No definition available.