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Goodwill and Intangibles Assets - Definite-lived and Indefinite-lived Intangible Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Amortized intangible assets: |  |
Gross carrying amount | $ 10,070 | $ 10,070
Accumulated amortization | (8,349) | (7,719)
Total | 1,721 | 2,351
Unamortized intangible assets: |  |
Gross carrying amount | 9,960 | 9,960
Total | 9,960 | 9,960
Gross carrying amount | 20,030 | 20,030
Accumulated amortization | (8,349) | (7,719)
Net intangible assets | 11,681 | 12,311
Trade Name |  |
Unamortized intangible assets: |  |
Gross carrying amount | 9,960 | 9,960
Total | 9,960 | 9,960
Backlog – Construction |  |
Amortized intangible assets: |  |
Gross carrying amount | 4,830 | 4,830
Accumulated amortization | (4,830) | (4,830)
Total | 0 | 0
Unamortized intangible assets: |  |
Accumulated amortization | (4,830) | (4,830)
Customer Relationships – Service |  |
Amortized intangible assets: |  |
Gross carrying amount | 4,710 | 4,710
Accumulated amortization | (3,112) | (2,655)
Total | 1,598 | 2,055
Unamortized intangible assets: |  |
Accumulated amortization | (3,112) | (2,655)
Favorable Leasehold Interests |  |
Amortized intangible assets: |  |
Gross carrying amount | 530 | 530
Accumulated amortization | (407) | (234)
Total | 123 | 296
Unamortized intangible assets: |  |
Accumulated amortization | $ (407) | $ (234)

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