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Intangible Assets | 3 Months Ended
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Apr. 01, 2017
Intangible Asset Disclosure Text Block [Abstract] |
Intangible Assets | Intangible Assets The gross carrying amount of intangible assets not subject to amortization and intangible assets subject to amortization is as follows (in thousands):
| April 1, 2017 |  | December 31, 2016
Indefinite Lived Intangible Assets |  |  |
Trade names | $ | 51,983 |  |  | $ | 51,687 |
| 51,983 |  |  | 51,687 |
Finite Lived Intangible Assets: |  |  |  |  |
Routes | 371,686 |  |  | 374,989 |
Permits | 495,939 |  |  | 493,311 |
Non-compete agreements | 3,564 |  |  | 3,638 |
Trade names | 76,102 |  |  | 76,033 |
Royalty, consulting, land use rights and leasehold | 13,554 |  |  | 13,456 |
| 960,845 |  |  | 961,427 |
Accumulated Amortization: |  |  |
Routes | (107,661 | ) |  | (105,934 | )
Permits | (179,690 | ) |  | (170,165 | )
Non-compete agreements | (1,843 | ) |  | (1,788 | )
Trade names | (23,343 | ) |  | (21,042 | )
Royalty, consulting, land use rights and leasehold | (2,471 | ) |  | (2,258 | )
| (315,008 | ) |  | (301,187 | )
Total Intangible assets, less accumulated amortization | $ | 697,820 |  |  | $ | 711,927 |
Gross intangible routes, permits, trade names, non-compete agreements and other intangibles partially decreased in fiscal 2017 as a result of approximately and $6.7 million of asset retirements. Amortization expense for the three months ended April 1, 2017 and April 2, 2016, was approximately $19.1 million, $19.2 million, respectively.

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- 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=66006027&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=66006027&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=66006027&loc=d3e16373-109275 + Details
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