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Consolidated Statements of Changes in Redeemable Non-controlling Interests and Stockholders' Equity - USD ($) $ in Thousands | Total | Additional Paid-in Capital | Retained Earnings | Treasury Stock | Accumulated Other Comprehensive Loss | Non-controlling Interest (“NCI”) | Class A Common Stock | Class A Common Stock Common Stock | Class B Common Stock | Class B Common Stock Common Stock
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Redeemable non-controlling interests beginning balance at Dec. 31, 2020 | $ 38,850 |  |  |  |  |  |  |  |  |
Increase (Decrease) in Temporary Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |
Contributions from RNCI, net of tax equity financing fees | 2,251 |  |  |  |  |  |  |  |  |
Distributions to RNCI | (1,009) |  |  |  |  |  |  |  |  |
Accretion of tax equity financing fees | 116 |  |  |  |  |  |  |  |  |
Investment fund call option exercise | (3,759) |  |  |  |  |  |  |  |  |
Net income | 9,733 |  |  |  |  |  |  |  |  |
Redeemable non-controlling interests ending balance at Dec. 31, 2021 | 46,182 |  |  |  |  |  |  |  |  |
Beginning balance (in shares) at Dec. 31, 2020 |  |  |  |  |  |  |  | 30,224,654 |  | 18,000,000
Treasury stock, beginning balance (in shares) at Dec. 31, 2020 |  |  |  | 2,101,795 |  |  |  |  |  |
Beginning balance at Dec. 31, 2020 | 492,813 | $ 145,496 | $ 368,390 | $ (11,788) | $ (9,290) | $ 0 |  | $ 3 |  | $ 2
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |
Equity offering of common stock, net of offering costs (in shares) |  |  |  |  |  |  |  | 2,875,000 |  |
Equity offering of common stock, net of offering costs | 120,084 | 120,084 |  |  |  |  |  |  |  |
Exercise of stock options (in shares) |  |  |  |  |  |  |  | 587,775 |  |
Exercise of stock options | 5,563 | 5,563 |  |  |  |  |  |  |  |
Stock-based compensation expense | 8,716 | 8,716 |  |  |  |  |  |  |  |
Employee stock purchase plan (in shares) |  |  |  |  |  |  |  | 28,880 |  |
Employee stock purchase plan | 1,364 | 1,364 |  |  |  |  |  |  |  |
Unrealized loss from interest rate hedges, net | 2,793 |  |  |  | 2,793 |  |  |  |  |
Foreign currency translation adjustment | (170) |  |  |  | (170) |  |  |  |  |
Accretion of tax equity financing fees | (116) |  | (116) |  |  |  |  |  |  |
Adjustment to investment fund call option exercise | 2,759 | 2,759 |  |  |  |  |  |  |  |
Contributions from RNCI, net of tax equity financing fees | 2,251 |  |  |  |  |  |  |  |  |
Net income | 70,458 |  | 70,458 |  |  |  |  |  |  |
Ending balance (in shares) at Dec. 31, 2021 |  |  |  |  |  |  |  | 33,716,309 |  | 18,000,000
Treasury stock, ending balance (in shares) at Dec. 31, 2021 |  |  |  | 2,101,795 |  |  |  |  |  |
Ending balance at Dec. 31, 2021 | 704,264 | 283,982 | 438,732 | $ (11,788) | (6,667) | 0 |  | $ 3 |  | $ 2
Increase (Decrease) in Temporary Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |
Contributions from RNCI, net of tax equity financing fees | 48,912 |  |  |  |  | 48,912 |  |  |  |
Distributions to RNCI | (1,039) |  |  |  |  |  |  |  |  |
Accretion of tax equity financing fees | 109 |  |  |  |  |  |  |  |  |
Investment fund call option exercise | (2,162) |  |  |  |  |  |  |  |  |
Net income | 3,533 |  |  |  |  |  |  |  |  |
Redeemable non-controlling interests ending balance at Dec. 31, 2022 | 46,623 |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |
Exercise of stock options (in shares) |  |  |  |  |  |  |  | 195,888 |  |
Exercise of stock options | 3,954 | 3,954 |  |  |  |  |  |  |  |
Stock-based compensation expense | 15,046 | 15,046 |  |  |  |  |  |  |  |
Employee stock purchase plan (in shares) |  |  |  |  |  |  |  | 36,165 |  |
Employee stock purchase plan | 2,009 | 2,009 |  |  |  |  |  |  |  |
Unrealized loss from interest rate hedges, net | 6,017 |  |  |  | 6,017 |  |  |  |  |
Foreign currency translation adjustment | (3,401) |  |  |  | (3,401) |  |  |  |  |
Accretion of tax equity financing fees | (109) |  | (109) |  |  |  |  |  |  |
Adjustment to investment fund call option exercise | 1,323 | 1,323 |  |  |  |  |  |  |  |
Contributions from RNCI, net of tax equity financing fees | 48,912 |  |  |  |  | 48,912 |  |  |  |
Net income | $ 95,016 |  | 94,926 |  |  | 90 |  |  |  |
Ending balance (in shares) at Dec. 31, 2022 |  |  |  |  |  |  | 33,948,362 | 33,948,362 | 18,000,000 | 18,000,000
Treasury stock, ending balance (in shares) at Dec. 31, 2022 | 2,101,795 |  |  | 2,101,795 |  |  |  |  |  |
Ending balance at Dec. 31, 2022 | $ 873,031 | 306,314 | 533,549 | $ (11,788) | (4,051) | 49,002 |  | $ 3 |  | $ 2
Increase (Decrease) in Temporary Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |
Contributions from RNCI, net of tax equity financing fees | 4,203 |  |  |  |  | 4,203 |  |  |  |
Distributions to RNCI | (632) |  |  |  |  |  |  |  |  |
Accretion of tax equity financing fees | 108 |  |  |  |  |  |  |  |  |
Investment fund call option exercise | 195 |  |  |  |  |  |  |  |  |
Net income | 571 |  |  |  |  |  |  |  |  |
Redeemable non-controlling interests ending balance at Dec. 31, 2023 | $ 46,865 |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |
Exercise of stock options (in shares) | 246,000 |  |  |  |  |  |  | 246,250 |  |
Exercise of stock options | $ 2,438 | 2,438 |  |  |  |  |  |  |  |
Stock-based compensation expense | 10,318 | 10,318 |  |  |  |  |  |  |  |
Employee stock purchase plan (in shares) |  |  |  |  |  |  |  | 60,003 |  |
Employee stock purchase plan | 2,017 | 2,017 |  |  |  |  |  |  |  |
Restricted stock units released (in shares) |  |  |  |  |  |  |  | 22,580 |  |
Unrealized loss from interest rate hedges, net | (538) |  |  |  | (538) |  |  |  |  |
Foreign currency translation adjustment | 1,574 |  |  |  | 1,544 | 30 |  |  |  |
Accretion of tax equity financing fees | (108) |  | (108) |  |  |  |  |  |  |
Adjustment to investment fund call option exercise | (195) | (195) |  |  |  |  |  |  |  |
Contributions from RNCI, net of tax equity financing fees | 4,203 |  |  |  |  | 4,203 |  |  |  |
Distributions to RNCI | (30,187) |  |  |  |  | (30,187) |  |  |  |
Net income | $ 63,333 |  | 62,470 |  |  | 863 |  |  |  |
Ending balance (in shares) at Dec. 31, 2023 |  |  |  |  |  |  | 34,277,195 | 34,277,195 | 18,000,000 | 18,000,000
Treasury stock, ending balance (in shares) at Dec. 31, 2023 | 2,101,795 |  |  | 2,101,795 |  |  |  |  |  |
Ending balance at Dec. 31, 2023 | $ 925,886 | $ 320,892 | $ 595,911 | $ (11,788) | $ (3,045) | $ 23,911 |  | $ 3 |  | $ 2

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