XML 110 R95.htm IDEA: XBRL DOCUMENT v2.4.1.9

Business Segments (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 03, 2015 segment	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Jan. 03, 2015 segment		Dec. 28, 2013		Dec. 29, 2012		Dec. 29, 2013 segment
Segment Reporting Information [Line Items]
Number of Business Segments	3dar_NumberOfBusinessSegments								3dar_NumberOfBusinessSegments						3dar_NumberOfBusinessSegments
Net Sales	$ 1,000,203us-gaap_SalesRevenueNet	$ 978,665us-gaap_SalesRevenueNet	$ 1,031,283us-gaap_SalesRevenueNet	$ 946,292us-gaap_SalesRevenueNet	$ 447,939us-gaap_SalesRevenueNet	$ 445,130us-gaap_SalesRevenueNet	$ 443,542us-gaap_SalesRevenueNet	$ 465,657us-gaap_SalesRevenueNet	$ 3,956,443us-gaap_SalesRevenueNet		$ 1,802,268us-gaap_SalesRevenueNet		$ 1,772,552us-gaap_SalesRevenueNet
Capital expenditures									228,918us-gaap_PaymentsToAcquireProductiveAssets	[1]	118,307us-gaap_PaymentsToAcquireProductiveAssets	[1]	115,413us-gaap_PaymentsToAcquireProductiveAssets	[1]
Vion Ingredients [Member]
Segment Reporting Information [Line Items]
Capital expenditures									984,200us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_BusinessAcquisitionAxis = dar_VIONandCustomerBlendersAcquisitionMember
Terra Transaction and Rothsay Acquisition [Member]
Segment Reporting Information [Line Items]
Capital expenditures									167,000us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_BusinessAcquisitionAxis = dar_TerraTransactionandRothsayAcquisitionMember
BioPur Transaction [Member]
Segment Reporting Information [Line Items]
Capital expenditures											$ 600us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_BusinessAcquisitionAxis = dar_BiopurTransactionMember
[1] Excludes the capital assets acquired as part of the acquisition of assets related to VION Acquisition and Custom Blenders acquisition in fiscal 2014 of approximately $984.2 million, the Terra Transaction and the Rothsay Acquisition in fiscal 2013 of approximately $167.0 million and the BioPur acquisition in fiscal 2012 of approximately $0.6 million

X

- Definition

Number of Business Segments

+ References

No definition available.

+ Details

Name:	dar_NumberOfBusinessSegments
Namespace Prefix:	dar_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsToAcquireProductiveAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

Name:	us-gaap_SalesRevenueNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=dar_BiopurTransactionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=dar_TerraTransactionandRothsayAcquisitionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=dar_VIONandCustomerBlendersAcquisitionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: