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v3.7.0.1

Goodwill | 3 Months Ended
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Apr. 01, 2017
Intangible Asset Disclosure Text Block [Abstract] |
Goodwill | Goodwill Changes in the carrying amount of goodwill (in thousands):
| Feed Ingredients | Food Ingredients | Fuel Ingredients | Total
Balance at December 31, 2016 |  |  |  |
Goodwill | $ | 813,621 |  | $ | 317,008 |  | $ | 111,178 |  | $ | 1,241,807 |
Accumulated impairment losses | (15,914 | ) | — |  | — |  | (15,914 | )
| 797,707 |  | 317,008 |  | 111,178 |  | 1,225,893 |
Goodwill acquired during year | — |  | — |  | — |  | — |
Foreign currency translation | 3,695 |  | 2,424 |  | 1,259 |  | 7,378 |
Balance at April 1, 2017 |  |  |  |  |  |  |
Goodwill | 817,316 |  | 319,432 |  | 112,437 |  | 1,249,185 |
Accumulated impairment losses | (15,914 | ) | — |  | — |  | (15,914 | )
| $ | 801,402 |  | $ | 319,432 |  | $ | 112,437 |  | $ | 1,233,271 |

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- Definition Intangible Asset Disclosure Text Block [Abstract] + References No definition available. + Details
Name: | dar_IntangibleAssetDisclosureTextBlockAbstract
Namespace Prefix: | dar_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The entire disclosure for goodwill. + References No definition available. + Details
Name: | us-gaap_GoodwillDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration