XML 38 R16.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Other Intangibles (Notes) | 12 Months Ended
--- | ---
Dec. 31, 2015
Other Intangible Assets Disclosure [Abstract] |
Intangible Assets Disclosure [Text Block] | Other Intangible Assets Our identifiable intangible assets are are as follows (in thousands):
|  | Useful |  |  |  | Accumulated |  |
As of December 31, 2015 |  | Life |  | Gross |  | Amortization |  | Net
Intangible assets subject to amortization: |  |  |  |  |  |  |  |
Supply contracts (Gross) |  | 11.5 |  | $ | 12,227 |  |  | $ | (10,012 | ) |  | $ | 2,215 |
Intangible assets not subject to amortization: |  |  |  |  |  |  |  |
Rights-of-way assets |  | Indefinite |  | 13,267 |  |  | — |  |  | 13,267 |
Total |  |  |  | $ | 25,494 |  |  | $ | (10,012 | ) |  | $ | 15,482 |
|  | Useful |  |  |  | Accumulated |  |
As of December 31, 2014 |  | Life |  | Gross |  | Amortization |  | Net
Intangible assets subject to amortization: |  |  |  |  |  |  |  |
Supply contracts (Gross) |  | 11.5 |  | $ | 12,227 |  |  | $ | (8,949 | ) |  | $ | 3,278 |
Intangible assets not subject to amortization: |  |  |  |  |  |  |  |
Rights-of-way assets |  | Indefinite |  | 13,242 |  |  | — |  |  | 13,242 |
Total |  |  |  | $ | 25,469 |  |  | $ | (8,949 | ) |  | $ | 16,520 |
Amortization of intangible assets was $1.1 million during each of the years ended December 31, 2015, 2014 and 2013 and is included in depreciation and amortization on the accompanying consolidated statements of income and comprehensive income. Amortization expense is estimated to be $1.1 million per year for the years ended 2016 through 2017. We expect to incur $0.1 million of amortization expense in 2018, at which point our supply contracts will be fully amortized.

X
- Definition Other Intangible Assets Disclosure [Abstract] + References No definition available. + Details
Name: | dk_OtherIntangibleAssetsDisclosureAbstract
Namespace Prefix: | dk_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16373-109275 + Details
Name: | us-gaap_IntangibleAssetsDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration