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Commitments and Contingencies (Tables) | 3 Months Ended
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Mar. 31, 2022
Commitments and Contingencies Disclosure [Abstract] |
Financial Instruments with Off-Balance-Sheet Risk | Financial instruments with off-balance-sheet risk were as follows:
| March 31, 2022 |  | December 31, 2021
Commitments to extend credit | $ | 10,356,196 |  |  | $ | 10,420,142 |
Standby letters of credit | 236,798 |  |  | 238,690 |
Deferred standby letter of credit fees | 1,704 |  |  | 2,072 |
Commitments, Off-Balance-Sheet, Allowance for Credit Losses [Table Text Block] | The following table details activity in the allowance for credit losses on off-balance-sheet credit exposures.
|  |  | Three Months Ended March 31,
|  |  |  |  | 2022 |  | 2021
Beginning balance |  |  |  |  | $ | 50,314 |  |  | $ | 44,152 |
Credit loss expense (benefit) |  |  |  |  | (4,464) |  |  | 65 |
Ending balance |  |  |  |  | $ | 45,850 |  |  | $ | 44,217 |
Lease Commitments, Components of Lease Expense [Table Text Block] | We lease certain office facilities and office equipment under operating leases. The components of total lease expense were as follows:
|  |  | Three Months Ended March 31,
|  |  |  |  | 2022 |  | 2021
Amortization of lease right-of-use assets |  |  |  |  | $ | 8,105 |  |  | $ | 8,283 |
Short-term lease expense |  |  |  |  | 613 |  |  | 204 |
Non-lease components (including taxes, insurance, common maintenance, etc.) |  |  |  |  | 3,020 |  |  | 3,004 |
Total |  |  |  |  | $ | 11,738 |  |  | $ | 11,491 |

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- Definition Tabular disclosure of the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined) which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13467-108611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611 + Details
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