| Schedule of Segment Reporting Information, by Segment [Table Text Block] |
| | | | | December 28, 2013 | | | | | | Global | Value | | | | | | | | | | Sourcing | Added | Consumer | SunOpta | Opta | Consol- | | | | | | and Supply | Ingredients | Products | Foods | Minerals | idated | | | | | | $ | $ | $ | $ | $ | $ | | Segment revenues from external customers | 529,888 | 131,157 | 379,449 | 1,040,494 | 141,435 | 1,181,929 | | Segment operating income | 7,622 | 7,895 | 25,224 | 40,741 | 6,731 | 47,472 | | Corporate Services | | | | | | (8,390) | | Other expense, net(1) | | | | | | (7,049) | | Goodwill impairment(2) | | | | | | (3,552) | | Interest expense, net | | | | | | (7,860) | | Impairment loss on investment | | | | | | (21,495) | | Loss from continuing operations | | | | | | | | | before income taxes | | | | | | (874) | | | | | | | | | | | | | | | | | December 29, 2012 | | | | | | Global | Value | | | | | | | | | | Sourcing | Added | Consumer | SunOpta | Opta | Consol- | | | | | | and Supply | Ingredients | Products | Foods | Minerals | idated | | | | | | $ | $ | $ | $ | $ | $ | | Segment revenues from external customers | 499,454 | 123,551 | 341,408 | 964,413 | 126,651 | 1,091,064 | | Segment operating income | 14,137 | 7,975 | 20,799 | 42,911 | 10,062 | 52,973 | | Corporate Services | | | | | | (6,001) | | Other expense, net | | | | | | (2,194) | | Goodwill impairment | | | | | | | | Interest expense, net | | | | | | (9,333) | | Impairment loss on investment | | | | | | | | Earnings from continuing operations | | | | | | | | | before income taxes | | | | | | 35,445 | | | | | | | | | | | | | | | | | December 31, 2011 | | | | | | Global | Value | | | | | | | | | | Sourcing | Added | Consumer | SunOpta | Opta | Consol- | | | | | | and Supply | Ingredients | Products | Foods | Minerals | idated | | | | | | $ | $ | $ | $ | $ | $ | | Segment revenues from external customers | 490,611 | 133,429 | 302,711 | 926,751 | 93,120 | 1,019,871 | | Segment operating income | 11,480 | 10,205 | 13,273 | 34,958 | 7,577 | 42,535 | | Corporate Services | | | | | | (8,766) | | Other income, net(3) | | | | | | 2,832 | | Goodwill impairment | | | | | | | | Interest expense, net | | | | | | (8,839) | | Impairment loss on investment | | | | | | | | Earnings from continuing operations | | | | | | | | | before income taxes | | | | | | 27,762 |
| | | | | December 28, 2013 | December 29, 2012 | December 31, 2011 | | | | | | $ | $ | $ | | Segment capital expenditures: | | | | | | Global Sourcing and Supply | 13,362 | 10,227 | 3,105 | | | Value Added Ingredients | 3,666 | 2,114 | 1,985 | | | Consumer Products | 11,389 | 8,891 | 9,287 | | | | SunOpta Foods | 28,417 | 21,232 | 14,377 | | | Opta Minerals | 3,100 | 2,504 | 4,901 | | | | Total segment capital expenditures | 31,517 | 23,736 | 19,278 | | | Corporate Services | 574 | 812 | 636 | | | | Total capital expenditures | 32,091 | 24,548 | 19,914 | | | | | | | | | | Segment depreciation and amortization: | | | | | | Global Sourcing and Supply | 6,091 | 5,115 | 4,867 | | | Value Added Ingredients | 2,775 | 2,613 | 2,454 | | | Consumer Products | 6,475 | 5,949 | 5,506 | | | | SunOpta Foods | 15,341 | 13,677 | 12,827 | | | Opta Minerals | 6,257 | 5,731 | 4,207 | | | | Total segment depreciation and amortization | 21,598 | 19,408 | 17,034 | | | Corporate Services | 801 | 818 | 775 | | | | Total depreciation and amortization | 22,399 | 20,226 | 17,809 |
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| Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Table Text Block] |
| | | | | December 28, 2013 | December 29, 2012 | | | | | | $ | $ | | Segment assets: | | | | | Global Sourcing and Supply | 304,826 | 307,372 | | | Value Added Ingredients | 64,855 | 61,098 | | | Consumer Products | 167,590 | 146,705 | | | | SunOpta Foods | 537,271 | 515,175 | | | Opta Minerals | 137,106 | 141,418 | | | | Total segment assets | 674,377 | 656,593 | | | Corporate Services | 31,558 | 50,717 | | | | Total assets | 705,935 | 707,310 | | | | | | | | | Segment goodwill: | | | | | Global Sourcing and Supply | 27,822 | 27,533 | | | Value Added Ingredients | 12,030 | 12,030 | | | Consumer Products | 2,362 | 2,934 | | | | SunOpta Foods | 42,214 | 42,497 | | | Opta Minerals | 11,459 | 14,917 | | | | Total segment goodwill | 53,673 | 57,414 |
| | | | | December 28, 2013 | December 29, 2012 | December 31, 2011 | | | | | | $ | $ | $ | | Revenues from external customers: | | | | | | U.S. | 903,349 | 851,172 | 767,887 | | | Canada | 61,264 | 59,613 | 48,771 | | | Europe and other | 217,316 | 180,279 | 203,213 | | | | Total revenues from external customers | 1,181,929 | 1,091,064 | 1,019,871 |
| | | | | December 28, 2013 | December 29, 2012 | | | | | | $ | $ | | Long-lived assets: | | | | | U.S. | 121,083 | 114,614 | | | Canada | 11,896 | 13,326 | | | Europe and other | 25,094 | 12,639 | | | | Total long-lived assets | 158,073 | 140,579 |
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