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Investments - Additional Information (Details) - USD ($) | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Mar. 31, 2017 | Jan. 31, 2016 | Dec. 31, 2012 | Mar. 31, 2017 | Mar. 31, 2016 | Dec. 31, 2016
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Percentage of carried interest income to be allocated to Partnership for future interests in future carry funds |  |  | 47.50% |  |  |
Amount of cash for strategic investment contingent consideration |  | $ 63,000,000 |  |  |  |
Amount of promissory note for strategic investment contingent consideration |  | $ 120,000,000 |  |  |  |
Length of term in years of promissory note to Barclays (in years) |  | 6 years |  |  |  |
Value of common units to be issued to equity investment owner in future period (maximum) | $ 10,000,000.0 |  |  | $ 10,000,000.0 |  |
Vesting period of common units to be issued to equity investment owner in future period |  |  |  | 42 months |  |
Partnership's basis difference based on underlying net assets | 27,700,000 |  |  | $ 27,700,000 |  | $ 29,800,000
Basis difference amortization period (in years) |  |  |  | 10 years |  |
Amount of accelerated expense recognized in the current period as a result of the March 2017 amendments to the original NGP agreements |  |  |  | $ 26,000,000 | $ 3,600,000 |
Minimum percent of aggregate assets for individual investments with fair value |  |  |  | 5.00% |  |
Corporate mezzanine securities and bonds |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Investments in CLOs and other | 159,400,000 |  |  | $ 159,400,000 |  | $ 156,100,000
Barclays Natural Resource Investments |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Contingent consideration |  | $ 183,000,000.0 |  |  |  |
Carlyle Holdings |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Issuance of partnership units (in shares) |  |  | 597,944 |  |  |
Value of additional partnership units to be issued upon the satisfaction of certain performance conditions |  |  | $ 15,000,000 |  |  |
ECM Capital, L.P. |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Contingent consideration |  |  | 45,000,000.0 |  |  |
Portion of cash contingent consideration paid to equity investment owner in current period | $ 22,500,000 |  |  |  |  |
ECM Capital, L.P. | Barclays Natural Resource Investments |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Purchase price |  |  | $ 504,600,000 |  |  |
Issuance of partnership units (in shares) |  |  | 996,572 |  |  |
Management fee-related revenues |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Percentage of management fee revenue allocated to Carlyle |  |  | 55.00% |  |  |
Accelerated Expense |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Amount of accelerated expense recognized in the current period as a result of the March 2017 amendments to the original NGP agreements |  |  |  | $ 20,800,000 |  |

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