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Redeemable Noncontrolling Interests - Schedule of Redeemable Noncontrolling Interest (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward] |  |  |
Balance at December 31, 2018 | $ 57,481 |  |
Net income (loss) attributable to noncontrolling interests | 5,241 |  |
Net income (loss) | 10,886 | $ 515 | $ 1,420
Net subscriptions (redemptions) and other | (4,522) |  |
Balance at December 31, 2019 | 63,845 | 57,481 |
Consolidated investment products |  |  |
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward] |  |  |
Balance at December 31, 2018 | 2,384 |  |
Net income (loss) attributable to noncontrolling interests | 1,809 |  |
Changes in redemption value | (13,926) | 56 | $ (65,576)
Net income (loss) | 1,809 |  |
Net subscriptions (redemptions) and other | 1,236 |  |
Balance at December 31, 2019 | 5,429 | 2,384 |
Affiliate Noncontrolling Interests |  |  |
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward] |  |  |
Balance at December 31, 2018 | 55,097 |  |
Net income (loss) attributable to noncontrolling interests | 3,432 |  |
Net income (loss) | 9,077 |  |
Net subscriptions (redemptions) and other | (5,758) |  |
Balance at December 31, 2019 | 58,416 | $ 55,097 |
Portion at Other than Fair Value Measurement |  |  |
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward] |  |  |
Changes in redemption value | 5,645 |  |
Portion at Other than Fair Value Measurement | Consolidated investment products |  |  |
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward] |  |  |
Changes in redemption value | 0 |  |
Portion at Other than Fair Value Measurement | Affiliate Noncontrolling Interests |  |  |
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward] |  |  |
Changes in redemption value | $ 5,645 |  |

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- Definition Change in noncontrolling interest during the period as a result of a change in the redemption value of redeemable noncontrolling interest. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph 15 -URI http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph 16(c) -URI http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph 14 -URI http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764 + Details
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- Definition Amount of Net Income (Loss) attributable to redeemable noncontrolling interest. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.19) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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