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Condensed Consolidated Statements of Changes in Equity - USD ($) $ in Thousands | Total | Cantor [Member] | Smith Mack [Member] | Additional Paid-in Capital [Member] | Additional Paid-in Capital [Member] Cantor [Member] | Additional Paid-in Capital [Member] Smith Mack [Member] | Treasury Stock [Member] | Retained Deficit [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Noncontrolling Interest in Subsidiaries [Member] | Noncontrolling Interest in Subsidiaries [Member] Cantor [Member] | Noncontrolling Interest in Subsidiaries [Member] Smith Mack [Member] | Class A Common Stock [Member] Common Stock [Member] | Class A Common Stock [Member] Common Stock [Member] Smith Mack [Member] | Class B Common Stock [Member] Common Stock [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2018 | $ 863,174 |  |  | $ 2,208,221 |  |  | $ (314,240) | $ (1,105,019) | $ (24,465) | $ 94,801 |  |  | $ 3,417 |  | $ 459
Consolidated net income (loss) | 87,174 |  |  |  |  |  |  | 61,868 |  | 25,306 |  |  |  |  |
Other comprehensive gain, net of tax | 987 |  |  |  |  |  |  |  | 912 | 75 |  |  |  |  |
Equity-based compensation | 2,018 |  |  | 1,360 |  |  |  |  |  | 656 |  |  | 2 |  |
Dividends to common stockholders | (47,434) |  |  |  |  |  |  | (47,434) |  |  |  |  |  |  |
Earnings distributions to limited partnership interests and other noncontrolling interests | (27,188) |  |  |  |  |  |  |  |  | (27,188) |  |  |  |  |
Grant of exchangeability and redemption of limited partnership interests | 358 |  |  | (190) |  |  |  |  |  | 529 |  |  | 19 |  |
Issuance of Class A common stock (net of costs) | 303 |  |  | 237 |  |  |  |  |  | 65 |  |  | 1 |  |
Redemption of FPUs | (10) |  |  |  |  |  |  |  |  | (10) |  |  |  |  |
Repurchase of Class A common stock | (1,236) |  |  |  |  |  | (970) |  |  | (266) |  |  |  |  |
Contributions of capital to and from Cantor for equity-based compensation | (380) |  |  | (271) |  |  |  |  |  | (109) |  |  |  |  |
Issuance of Class A common stock and RSUs for acquisitions | 1,874 |  |  | 1,471 |  |  |  |  |  | 403 |  |  |  |  |
Other | (994) |  |  | (795) |  |  |  |  |  | (199) |  |  |  |  |
Ending Balance at Mar. 31, 2019 | 878,646 |  |  | 2,210,033 |  |  | (315,210) | (1,090,585) | (23,553) | 94,063 |  |  | 3,439 |  | 459
Beginning Balance at Dec. 31, 2019 | 743,737 |  |  | 2,271,947 |  |  | (315,308) | (1,241,754) | (33,102) | 57,911 |  |  | 3,584 |  | 459
Consolidated net income (loss) | 21,032 |  |  |  |  |  |  | 14,314 |  | 6,718 |  |  |  |  |
Other comprehensive gain, net of tax | (10,209) |  |  |  |  |  |  |  | (10,980) | 771 |  |  |  |  |
Equity-based compensation | 2,706 |  |  | 1,833 |  |  |  |  |  | 866 |  |  | 7 |  |
Dividends to common stockholders | (49,633) |  |  |  |  |  |  | (49,633) |  |  |  |  |  |  |
Earnings distributions to limited partnership interests and other noncontrolling interests | (18,200) |  |  |  |  |  |  |  |  | (18,200) |  |  |  |  |
Grant of exchangeability and redemption of limited partnership interests | 24,798 |  |  | 17,029 |  |  |  |  |  | 7,748 |  |  | 21 |  |
Issuance of Class A common stock (net of costs) | 293 |  |  | 232 |  |  |  |  |  | 60 |  |  | 1 |  |
Contributions of capital to and from Cantor for equity-based compensation |  | $ 1,218 |  |  | $ 729 |  |  |  |  |  | $ 489 |  |  |  |
Issuance of Class A common stock and RSUs for acquisitions |  |  | $ 1,399 |  |  | $ 1,179 |  |  |  |  |  | $ 217 |  | $ 3 |
Cumulative effect of current expected credit losses standard adoption | Accounting Standards Update 2016-13 [Member] | (1,300) |  |  |  |  |  |  | (883) |  | (417) |  |  |  |  |
Other | 115 |  |  | 116 |  |  |  |  |  | (1) |  |  |  |  |
Ending Balance at Mar. 31, 2020 | $ 715,956 |  |  | $ 2,293,065 |  |  | $ (315,308) | $ (1,277,956) | $ (44,082) | $ 56,162 |  |  | $ 3,616 |  | $ 459

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