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Consolidated Statements of Stockholders’ Equity - USD ($) $ in Thousands | Total | Parent [Member] | Common Stock [Member] | Additional Paid-in Capital [Member] | Treasury Stock [Member] | AOCI Attributable to Parent [Member] | Retained Earnings [Member] | Noncontrolling Interest [Member] | Natural Gas Swap [Member] | Natural Gas Swap [Member] Parent [Member] | Natural Gas Swap [Member] AOCI Attributable to Parent [Member] | Corn Option [Member] | Corn Option [Member] Parent [Member] | Corn Option [Member] AOCI Attributable to Parent [Member]
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Balance (in shares) at Jan. 03, 2015 |  |  | 164,712,663 |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity, Beginning Balance at Jan. 03, 2015 | $ 2,051,134 | $ 1,952,990 | $ 1,662 | $ 1,479,637 | $ (23,207) | $ (177,060) | $ 671,958 | $ 98,144 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | 85,279 | 78,531 |  |  |  |  | 78,531 | 6,748 |  |  |  |  |  |
Distribution of noncontrolling interest earnings | (3,295) |  |  |  |  |  |  | (3,295) |  |  |  |  |  |
Deductions to noncontrolling interests | (87) |  |  |  |  |  |  | (87) |  |  |  |  |  |
Pension liability adjustments, net of tax | 4,202 | 4,202 |  |  |  | 4,202 |  |  |  |  |  |  |  |
Total natural gas derivatives |  |  |  |  |  |  |  |  | $ 0 |  |  | $ 1,767 | $ 1,767 | $ 1,767
Foreign currency translation adjustments | (162,436) | (164,827) |  |  |  | (164,827) |  | 2,391 |  |  |  |  |  |
Issuance of non-vested stock (in shares) |  |  | 261,615 |  |  |  |  |  |  |  |  |  |  |
Issuance of non-vested stock | 3,791 | 3,791 | $ 3 | 3,788 |  |  |  |  |  |  |  |  |  |
Stock-based compensation | 2,083 | 2,083 |  | 2,083 |  |  |  |  |  |  |  |  |  |
Tax benefits associated with stock-based compensation | (389) | (389) |  | (389) |  |  |  |  |  |  |  |  |  |
Treasury stock (in shares) |  |  | (834,477) |  |  |  |  |  |  |  |  |  |  |
Treasury stock | (11,109) | (11,109) |  |  | (11,109) |  |  |  |  |  |  |  |  |
Issuance of common stock (in shares) |  |  | 595,575 |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock | 3,670 | 3,670 | $ 6 | 3,664 |  |  |  |  |  |  |  |  |  |
Balance (in shares) at Jan. 02, 2016 |  |  | 164,735,376 |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity, Ending Balance at Jan. 02, 2016 | 1,974,610 | 1,870,709 | $ 1,671 | 1,488,783 | (34,316) | (335,918) | 750,489 | 103,901 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | 107,224 | 102,313 |  |  |  |  | 102,313 | 4,911 |  |  |  |  |  |
Distribution of noncontrolling interest earnings | (3,688) |  |  |  |  |  |  | (3,688) |  |  |  |  |  |
Pension liability adjustments, net of tax | (1,016) | (1,016) |  |  |  | (1,016) |  |  |  |  |  |  |  |
Total natural gas derivatives |  |  |  |  |  |  |  |  |  |  |  | 625 | 625 | 625
Foreign currency translation adjustments | (5,593) | (3,697) |  |  |  | (3,697) |  | (1,896) |  |  |  |  |  |
Issuance of non-vested stock (in shares) |  |  | 341,185 |  |  |  |  |  |  |  |  |  |  |
Issuance of non-vested stock | 4,131 | 4,131 | $ 3 | 4,128 |  |  |  |  |  |  |  |  |  |
Stock-based compensation | 4,081 | 4,081 |  | 4,081 |  |  |  |  |  |  |  |  |  |
Tax benefits associated with stock-based compensation | (364) | (364) |  | (364) |  |  |  |  |  |  |  |  |  |
Treasury stock (in shares) |  |  | (693,250) |  |  |  |  |  |  |  |  |  |  |
Treasury stock | (6,593) | (6,593) |  |  | (6,593) |  |  |  |  |  |  |  |  |
Issuance of common stock (in shares) |  |  | 229,247 |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock | 2,805 | 2,805 | $ 2 | 2,803 |  |  |  |  |  |  |  |  |  |
Balance (in shares) at Dec. 31, 2016 |  |  | 164,612,558 |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity, Ending Balance at Dec. 31, 2016 | 2,076,222 | 1,972,994 | $ 1,676 | 1,499,431 | (40,909) | (340,006) | 852,802 | 103,228 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustment to initially apply FASB ASC No. 2016-09 Improvements to Employee Share-Based Payment Accounting | (43) | (43) |  |  |  |  | (43) |  |  |  |  |  |  |
Net income | 133,354 | 128,468 |  |  |  |  | 128,468 | 4,886 |  |  |  |  |  |
Distribution of noncontrolling interest earnings | (4,020) |  |  |  |  |  |  | (4,020) |  |  |  |  |  |
Deductions to noncontrolling interests | (19,112) | (1,721) |  | (1,721) |  |  |  | (17,391) |  |  |  |  |  |
Pension liability adjustments, net of tax | 5,829 | 5,829 |  |  |  | 5,829 |  |  |  |  |  |  |  |
Total natural gas derivatives |  |  |  |  |  |  |  |  | $ (18) | $ (18) | $ (18) | $ (1,078) | $ (1,078) | $ (1,078)
Foreign currency translation adjustments | 121,810 | 125,749 |  |  |  | 125,749 |  | (3,939) |  |  |  |  |  |
Stock-based compensation | 14,831 | 14,831 |  | 14,831 |  |  |  |  |  |  |  |  |  |
Treasury stock (in shares) |  |  | (210,206) |  |  |  |  |  |  |  |  |  |  |
Treasury stock | (3,154) | (3,154) |  |  | (3,154) |  |  |  |  |  |  |  |  |
Issuance of common stock (in shares) |  |  | 251,085 |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock | 3,076 | 3,076 | $ 3 | 3,073 |  |  |  |  |  |  |  |  |  |
Balance (in shares) at Dec. 30, 2017 |  |  | 164,653,437 |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity, Ending Balance at Dec. 30, 2017 | $ 2,327,697 | $ 2,244,933 | $ 1,679 | $ 1,515,614 | $ (44,063) | $ (209,524) | $ 981,227 | $ 82,764 |  |  |  |  |  |

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