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Commitments and Contingencies (Tables) | 9 Months Ended
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Sep. 30, 2022
Commitments and Contingencies Disclosure [Abstract] |
Financial Instruments with Off-Balance-Sheet Risk | Financial instruments with off-balance-sheet risk were as follows:
| September 30, 2022 |  | December 31, 2021
Commitments to extend credit | $ | 11,439,755 |  |  | $ | 10,420,142 |
Standby letters of credit | 383,720 |  |  | 238,690 |
Deferred standby letter of credit fees | 2,144 |  |  | 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 September 30, |  | Nine Months Ended September 30,
| 2022 |  | 2021 |  | 2022 |  | 2021
Beginning balance | $ | 50,246 |  |  | $ | 48,596 |  |  | $ | 50,314 |  |  | $ | 44,152 |
Credit loss expense (benefit) | 2,463 |  |  | 3,023 |  |  | 2,395 |  |  | 7,467 |
Ending balance | $ | 52,709 |  |  | $ | 51,619 |  |  | $ | 52,709 |  |  | $ | 51,619 |
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 September 30, |  | Nine Months Ended September 30,
| 2022 |  | 2021 |  | 2022 |  | 2021
Amortization of lease right-of-use assets | $ | 8,389 |  |  | $ | 8,172 |  |  | $ | 24,703 |  |  | $ | 24,584 |
Short-term lease expense | 536 |  |  | 384 |  |  | 1,639 |  |  | 1,118 |
Non-lease components (including taxes, insurance, common maintenance, etc.) | 3,092 |  |  | 2,864 |  |  | 8,860 |  |  | 8,205 |
Total | $ | 12,017 |  |  | $ | 11,420 |  |  | $ | 35,202 |  |  | $ | 33,907 |

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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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