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Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 273,920 | $ 223,036 | $ 526,122 | $ 435,449
Percentage of revenue recognized over time | 94.00% | 94.00% | 94.00% | 93.00%
United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 252,536 | $ 211,218 | $ 486,545 | $ 407,157
Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 9,973 | 8,458 | 20,826 | 19,011
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 11,411 | 3,360 | 18,751 | 9,281
Project revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 196,255 | 159,930 | 376,948 | 304,359
O&M revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 19,596 | 17,308 | 38,080 | 35,370
Energy assets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 36,941 | 28,749 | 70,228 | 56,971
Integrated-PV |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 10,721 | 8,530 | 19,875 | 19,999
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 10,407 | 8,519 | 20,991 | 18,750
U.S. Regions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 109,470 | 89,574 | 194,743 | 175,414
U.S. Regions | Project revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 92,601 | 76,040 | 163,759 | 147,533
U.S. Regions | O&M revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 5,303 | 4,283 | 9,613 | 8,635
U.S. Regions | Energy assets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 10,046 | 8,080 | 18,856 | 16,934
U.S. Regions | Integrated-PV |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0 | 0 | 0 | 0
U.S. Regions | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 1,520 | 1,171 | 2,515 | 2,312
U.S. Federal |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 90,200 | 84,491 | 192,414 | 153,236
U.S. Federal | Project revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 77,075 | 72,220 | 167,164 | 128,334
U.S. Federal | O&M revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 11,742 | 10,755 | 23,182 | 22,381
U.S. Federal | Energy assets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 1,371 | 1,505 | 2,035 | 2,224
U.S. Federal | Integrated-PV |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0 | 0 | 0 | 0
U.S. Federal | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 12 | 11 | 33 | 297
Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 10,874 | 9,035 | 22,517 | 20,427
Canada | Project revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 7,307 | 6,167 | 16,308 | 15,031
Canada | O&M revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0 | 17 | 26 | 26
Canada | Energy assets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 1,571 | 1,344 | 2,318 | 2,007
Canada | Integrated-PV |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0 | 0 | 0 | 0
Canada | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 1,996 | 1,507 | 3,865 | 3,363
Non-Solar DG |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 35,571 | 23,129 | 65,939 | 45,853
Non-Solar DG | Project revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 9,241 | 3,004 | 13,895 | 5,375
Non-Solar DG | O&M revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 2,462 | 2,120 | 5,099 | 4,135
Non-Solar DG | Energy assets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 23,852 | 17,820 | 46,783 | 35,806
Non-Solar DG | Integrated-PV |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0 | 0 | 0 | 0
Non-Solar DG | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 16 | 185 | 162 | 537
All Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 27,805 | 16,807 | 50,509 | 40,519
All Other | Project revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 10,031 | 2,499 | 15,822 | 8,086
All Other | O&M revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 89 | 133 | 160 | 193
All Other | Energy assets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 101 | 0 | 236 | 0
All Other | Integrated-PV |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 10,721 | 8,530 | 19,875 | 19,999
All Other | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 6,863 | $ 5,645 | $ 14,416 | $ 12,241

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9031-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9038-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130543-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9054-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 + Details
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