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Fair Value Measurement and Fair Value of Financial Instruments - Carrying and Fair Value Estimates per the Fair Value Hierarchy of Financial Instruments Measured on a Nonrecurring Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Financial assets: |  |
Cash and cash equivalents | $ 2,163,353 | $ 3,912,935
Interest-bearing deposits with banks | 630,543 | 736,492
Resale agreements | 892,986 | 2,353,503
HTM debt securities | 3,012,667 | 0
Restricted equity securities, at cost | 78,254 | 77,434
Loans held-for-investment, net | 46,859,738 | 41,152,202
Financial liabilities: |  |
Federal funds purchased | 200,000 | 0
FHLB advances | 324,920 | 249,331
Repurchase agreements | 611,785 | 300,000
Carrying Amount |  |
Financial assets: |  |
Cash and cash equivalents | 2,163,353 | 3,912,935
Interest-bearing deposits with banks | 630,543 | 736,492
Resale agreements | 892,986 | 2,353,503
HTM debt securities | 3,012,667 |
Restricted equity securities, at cost | 78,254 | 77,434
Loans held-for-sale | 14,500 | 635
Loans held-for-investment, net | 46,859,738 | 41,152,202
Mortgage servicing rights | 6,523 | 5,706
Accrued interest receivable | 208,520 | 159,833
Financial liabilities: |  |
Demand, checking, savings and money market deposits | 43,498,799 | 45,388,550
Time deposits | 10,358,563 | 7,961,982
Federal funds purchased | 200,000 |
FHLB advances | 324,920 | 249,331
Repurchase agreements | 611,785 | 300,000
Long-term debt | 147,875 | 147,658
Accrued interest payable | 23,934 | 11,435
Estimated Fair Value |  |
Financial assets: |  |
Cash and cash equivalents | 2,163,353 | 3,912,935
Interest-bearing deposits with banks | 630,543 | 736,492
Resale agreements | 790,239 | 2,335,901
HTM debt securities | 2,459,135 |
Restricted equity securities, at cost | 78,254 | 77,434
Loans held-for-sale | 14,500 | 635
Loans held-for-investment, net | 46,147,082 | 41,199,599
Mortgage servicing rights | 10,532 | 9,104
Accrued interest receivable | 208,520 | 159,833
Financial liabilities: |  |
Demand, checking, savings and money market deposits | 43,498,799 | 45,388,550
Time deposits | 10,256,100 | 7,966,116
Federal funds purchased | 200,000 |
FHLB advances | 325,000 | 250,372
Repurchase agreements | 617,513 | 310,525
Long-term debt | 140,902 | 151,020
Accrued interest payable | 23,934 | 11,435
Estimated Fair Value | Level 1 |  |
Financial assets: |  |
Cash and cash equivalents | 2,163,353 | 3,912,935
Interest-bearing deposits with banks | 0 | 0
Resale agreements | 0 | 0
HTM debt securities | 466,085 |
Restricted equity securities, at cost | 0 | 0
Loans held-for-sale | 0 | 0
Loans held-for-investment, net | 0 | 0
Mortgage servicing rights | 0 | 0
Accrued interest receivable | 0 | 0
Financial liabilities: |  |
Demand, checking, savings and money market deposits | 0 | 0
Time deposits | 0 | 0
Federal funds purchased | 0 |
FHLB advances | 0 | 0
Repurchase agreements | 0 | 0
Long-term debt | 0 | 0
Accrued interest payable | 0 | 0
Estimated Fair Value | Level 2 |  |
Financial assets: |  |
Cash and cash equivalents | 0 | 0
Interest-bearing deposits with banks | 630,543 | 736,492
Resale agreements | 790,239 | 2,335,901
HTM debt securities | 1,993,050 |
Restricted equity securities, at cost | 78,254 | 77,434
Loans held-for-sale | 14,500 | 635
Loans held-for-investment, net | 0 | 0
Mortgage servicing rights | 0 | 0
Accrued interest receivable | 208,520 | 159,833
Financial liabilities: |  |
Demand, checking, savings and money market deposits | 43,498,799 | 45,388,550
Time deposits | 10,256,100 | 7,966,116
Federal funds purchased | 200,000 |
FHLB advances | 325,000 | 250,372
Repurchase agreements | 617,513 | 310,525
Long-term debt | 140,902 | 151,020
Accrued interest payable | 23,934 | 11,435
Estimated Fair Value | Level 3 |  |
Financial assets: |  |
Cash and cash equivalents | 0 | 0
Interest-bearing deposits with banks | 0 | 0
Resale agreements | 0 | 0
HTM debt securities | 0 |
Restricted equity securities, at cost | 0 | 0
Loans held-for-sale | 0 | 0
Loans held-for-investment, net | 46,147,082 | 41,199,599
Mortgage servicing rights | 10,532 | 9,104
Accrued interest receivable | 0 | 0
Financial liabilities: |  |
Demand, checking, savings and money market deposits | 0 | 0
Time deposits | 0 | 0
Federal funds purchased | 0 |
FHLB advances | 0 | 0
Repurchase agreements | 0 | 0
Long-term debt | 0 | 0
Accrued interest payable | $ 0 | $ 0

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- Definition Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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- Definition Amount, after valuation allowance, of financing receivable held for sale and not part of disposal group. Excludes loan covered under loss sharing agreement and loan classified as investment in debt security. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124265262&loc=d3e48678-111004 + Details
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