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Business Segment Information (Tables) | 12 Months Ended
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Dec. 31, 2018
Segment Reporting [Abstract] |
Schedule of Operational Results by Business Segments | An analysis of the Company’s business segment information and reconciliation to the consolidated financial statements is as follows:
| U.S. Regions |  | U.S. Federal |  | Canada |  | Non-solar DG |  | All Other |  | Total Consolidated
2018 |  |  |  |  |  |  |  |  |  |  |
Revenues | $ | 334,344 |  |  | $ | 246,309 |  |  | $ | 38,982 |  |  | $ | 82,655 |  |  | $ | 84,848 |  |  | $ | 787,138 |
Interest income | 9 |  |  | 126 |  |  | — |  |  | 147 |  |  | — |  |  | 282 |
Interest expense | 6,188 |  |  | 1,045 |  |  | 1,917 |  |  | 6,172 |  |  | 22 |  |  | 15,344 |
Depreciation and intangible asset amortization | 5,578 |  |  | 2,772 |  |  | 1,155 |  |  | 18,101 |  |  | 1,542 |  |  | 29,148 |
Unallocated corporate activity | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (30,415 | )
Income before taxes, excluding unallocated corporate activity | 20,543 |  |  | 36,332 |  |  | (2,746 | ) |  | 13,412 |  |  | 5,264 |  |  | 72,805 |
2017 |  |  |  |  |  |  |  |  |  |  |
Revenues | 290,196 |  |  | 229,146 |  |  | 43,803 |  |  | 79,220 |  |  | 74,787 |  |  | 717,152 |
Interest income | 2 |  |  | 44 |  |  | 1 |  |  | 83 |  |  | — |  |  | 130 |
Interest expense | 2,672 |  |  | 1,056 |  |  | 1,927 |  |  | 3,389 |  |  | 38 |  |  | 9,082 |
Depreciation and intangible asset amortization | 2,974 |  |  | 2,623 |  |  | 1,178 |  |  | 15,259 |  |  | 1,881 |  |  | 23,915 |
Unallocated corporate activity | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (27,195 | )
Income (loss) before taxes, excluding unallocated corporate activity | 13,865 |  |  | 29,261 |  |  | 1,751 |  |  | 8,115 |  |  | 2,920 |  |  | 55,912 |
2016 |  |  |  |  |  |  |  |  |  |  |
Revenues | 276,766 |  |  | 178,005 |  |  | 50,448 |  |  | 74,395 |  |  | 71,613 |  |  | 651,227 |
Interest income | 1 |  |  | 11 |  |  | — |  |  | 38 |  |  | — |  |  | 50 |
Interest expense | 1,055 |  |  | 942 |  |  | 1,737 |  |  | 3,319 |  |  | 23 |  |  | 7,076 |
Depreciation and intangible asset amortization | 1,901 |  |  | 2,588 |  |  | 1,090 |  |  | 14,557 |  |  | 2,628 |  |  | 22,764 |
Unallocated corporate activity | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (32,225 | )
Income (loss) before taxes, excluding unallocated corporate activity | 19,802 |  |  | 22,246 |  |  | (2,330 | ) |  | 9,301 |  |  | (427 | ) |  | 48,592 |
Revenue from External Customers by Products and Services | Information as to the Company’s revenues by service and product lines is as follows:
| Year Ended December 31,
| 2018 |  | 2017 |  | 2016
Revenues: |  |  |  |  |
Project | $ | 545,053 |  |  | $ | 506,550 |  |  | $ | 454,200 |
Energy Assets | 95,776 |  |  | 69,241 |  |  | 64,882 |
O&M | 65,236 |  |  | 60,574 |  |  | 63,082 |
Integrated-PV | 41,349 |  |  | 38,796 |  |  | 29,325 |
Other Services | 39,724 |  |  | 41,991 |  |  | 39,738 |
Total Revenues | $ | 787,138 |  |  | $ | 717,152 |  |  | $ | 651,227 |

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- Definition Tabular disclosure of entity-wide revenues from external customers for each product or service or each group of similar products or services if the information is not provided as part of the reportable operating segment information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e9031-108599 + Details
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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8813-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8721-108599 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8906-108599 + Details
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