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International Operations (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Loans: |  |  |  |
Loans | $ 6,561,289,000 | $ 6,348,172,000 |  |
Less allowance for probable loan losses | (61,384,000) | (67,687,000) | $ (64,661,000) | $ (66,988,000)
Net loans | 6,499,905,000 | 6,280,485,000 |  |
Accrued interest receivable | 36,803,000 | 34,456,000 |  |
International Banking Services |  |  |  |
Loans: |  |  |  |
Accrued interest receivable | 811,000 | 671,000 |  |
Outstanding standby and commercial letters of credit | 119,302,000 |  |  |
Revenues | 5,412,000 | 5,248,000 | $ 5,495,000 |
International Banking Services | Foreign |  |  |  |
Loans: |  |  |  |
Loans | 150,517,000 | 158,886,000 |  |
Less allowance for probable loan losses | (871,000) | (842,000) |  |
Net loans | 149,646,000 | 158,044,000 |  |
International Banking Services | Foreign | Commercial |  |  |  |
Loans: |  |  |  |
Loans | 101,955,000 | 113,019,000 |  |
International Banking Services | Foreign | Others |  |  |  |
Loans: |  |  |  |
Loans | $ 48,562,000 | $ 45,867,000 |  |

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