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Machinery, Equipment and Improvements on Leased Buildings - Summary of Property Plant and Equipment (Detail) - MXN ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure of detailed information about property, plant and equipment [Line Items]      
Beginning balance $ 1,630,393 $ 1,555,593 $ 812,653
Additions 68,046 16,120 707,558
Divestitures (18,870) (3,227) (2,173)
Currency translation effect (23,881) 61,907 37,555
Ending balance 1,655,688 1,630,393 1,555,593
Machinery and equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Beginning balance 1,254,469 1,225,595  
Ending balance 1,197,349 1,254,469 1,225,595
Office furniture and equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Beginning balance 100,623 74,558  
Ending balance 123,805 100,623 74,558
Computer equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Beginning balance 219,619 214,725  
Ending balance 251,071 219,619 214,725
Transportation equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Beginning balance 11,663 13,675  
Ending balance 12,510 11,663 13,675
Communication equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Beginning balance 13,943 15,416  
Ending balance 13,656 13,943 15,416
Improvements on leased buildings [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Beginning balance 30,076 11,624  
Ending balance 57,297 30,076 11,624
Investment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Beginning balance 3,098,352 2,672,140 1,693,433
Additions 392,506 317,000 914,282
Divestitures (70,546) (61,993) (16,027)
Currency translation effect (50,812) 171,205 80,452
Ending balance 3,369,500 3,098,352 2,672,140
Investment [Member] | Machinery and equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Beginning balance 2,181,305 1,907,231 1,182,501
Additions 175,457 155,957 670,607
Divestitures (49,970) (16,257) (9,306)
Currency translation effect (37,872) 134,374 63,429
Ending balance 2,268,920 2,181,305 1,907,231
Investment [Member] | Office furniture and equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Beginning balance 208,676 174,688 143,538
Additions 40,958 39,878 27,737
Divestitures (6,427) (14,182) (435)
Currency translation effect (2,309) 8,292 3,848
Ending balance 240,898 208,676 174,688
Investment [Member] | Computer equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Beginning balance 596,652 508,373 303,645
Additions 136,915 90,195 193,369
Divestitures (12,751) (28,346) (972)
Currency translation effect (10,232) 26,430 12,331
Ending balance 710,584 596,652 508,373
Investment [Member] | Transportation equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Beginning balance 42,037 36,847 27,734
Additions 6,650 4,081 13,253
Divestitures (1,220) (1,000) (4,984)
Currency translation effect (399) 2,109 844
Ending balance 47,068 42,037 36,847
Investment [Member] | Communication equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Beginning balance 28,224 28,528 19,542
Additions 2,386 1,904 9,316
Divestitures (178) (2,208) (330)
Ending balance 30,432 28,224 28,528
Investment [Member] | Improvements on leased buildings [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Beginning balance 41,458 16,473 16,473
Additions 30,140 24,985  
Ending balance 71,598 41,458 16,473
Accumulated depreciation and amortisation [member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Beginning balance (1,467,959) (1,116,547) (880,780)
Additions (324,460) (300,880) (206,724)
Divestitures 51,676 58,766 13,854
Currency translation effect 26,931 (109,298) (42,897)
Ending balance (1,713,812) (1,467,959) (1,116,547)
Accumulated depreciation and amortisation [member] | Machinery and equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Beginning balance (926,836) (681,636) (536,137)
Additions (195,382) (189,241) (123,293)
Divestitures 33,308 15,838 7,337
Currency translation effect 17,339 (71,797) (29,543)
Ending balance (1,071,571) (926,836) (681,636)
Accumulated depreciation and amortisation [member] | Office furniture and equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Beginning balance (108,053) (100,130) (84,697)
Additions (16,363) (10,238) (12,636)
Divestitures 5,641 12,330 435
Currency translation effect 1,682 (10,015) (3,232)
Ending balance (117,093) (108,053) (100,130)
Accumulated depreciation and amortisation [member] | Computer equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Beginning balance (377,033) (293,648) (219,851)
Additions (101,207) (86,520) (65,456)
Divestitures 11,373 27,888 972
Currency translation effect 7,354 (24,753) (9,313)
Ending balance (459,513) (377,033) (293,648)
Accumulated depreciation and amortisation [member] | Transportation equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Beginning balance (30,374) (23,172) (25,564)
Additions (5,960) (5,469) (1,783)
Divestitures 1,220 1,000 4,984
Currency translation effect 556 (2,733) (809)
Ending balance (34,558) (30,374) (23,172)
Accumulated depreciation and amortisation [member] | Communication equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Beginning balance (14,281) (13,112) (10,723)
Additions (2,629) (2,879) (2,515)
Divestitures 134 1,710 126
Ending balance (16,776) (14,281) (13,112)
Accumulated depreciation and amortisation [member] | Improvements on leased buildings [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Beginning balance (11,382) (4,849) (3,808)
Additions (2,919) (6,533) (1,041)
Ending balance $ (14,301) $ (11,382) $ (4,849)