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Consolidated statements of cash flows: (Details) - MXN ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure Of Consolidated Statements Of Cash Flows [Line Items] |  |  |
Short term debt (Note 11) | $ 353,672 | $ 330,235 |
Short-term bank loans (Note 10) | 224,472 | 808,515 |
Long-term bank loans (Note 10) | 6,603,006 | 6,119,655 |
Long-term debt (Note 11) | 6,598,397 | 6,641,941 |
Interest expense | 842,386 | 926,312 | $ 1,084,293
Proceeds from bank loans | 4,650,000 | 306,241 |
Interest paid | (908,698) | (942,993) | (1,064,764)
Bank loans paid (Note 10) | (4,429,334) | (245,520) | (152,047)
Long-term debt |  |  |
Disclosure Of Consolidated Statements Of Cash Flows [Line Items] |  |  |
Short term debt (Note 11) | 353,672 | 330,235 | 311,372
Long-term debt (Note 11) | 6,598,397 | 6,641,941 | 6,488,569
Non-current portion of non-current secured bank loans received | 6,972,176 | 6,799,941 | 7,282,268
Interest expense | 454,863 | 450,806 | 444,028
Interest paid | (428,530) | (476,927) | (486,164)
Bank loans paid (Note 10) |  | (245,520) |
Payments of the long term debt and bank loan | (220,961) |  | (205,308)
Foreign currency translation | 174,521 | 452,281 | (234,883)
Non-current portion of non-current secured bank loans received | 6,952,069 | 6,972,176 | 6,799,941
Bank Loans |  |  |
Disclosure Of Consolidated Statements Of Cash Flows [Line Items] |  |  |
Short-term bank loans (Note 10) | 224,472 | 808,515 | 238,235
Long-term bank loans (Note 10) | 6,603,006 | 6,119,655 | 6,674,717
Non-current portion of non-current secured bank loans received | 6,928,170 | 6,912,952 | 7,218,113
Interest expense | 387,523 | 398,899 | 601,873
Proceeds from bank loans | 4,650,000 | 306,241 |
Interest paid | (480,168) | (466,066) | (578,600)
Bank loans paid (Note 10) | (4,429,334) | (245,520) |
Payments of the long term debt and bank loan |  |  | (152,047)
Foreign currency translation | (228,713) | 21,664 | (176,387)
Non-current portion of non-current secured bank loans received | $ 6,827,478 | $ 6,928,170 | $ 6,912,952

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