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Income Taxes and Related Payments - Additional information (Details) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2020 USD ($) TRA | Jun. 30, 2019 USD ($) | Dec. 31, 2019 USD ($)
Approximate percentage of earnings not subject to income taxes | 25.00% |  |
Effective tax rate | 18.30% | 16.00% |
Number of tax receivable agreements (TRAs) | TRA | 2 |  |
TRA percent of savings to be paid to shareholders | 85.00% |  |
Tax receivable agreement percentage to be retained by entity | 15.00% |  |
Tax receivable agreement payment period | 125 days |  |
Unrecognized tax benefits | $ 1,500 |  | $ 2,000
Deferred Tax Asset - Amortizable basis |  |  |
Deferred tax assets, beginning | 408,140 |  |
2020 Holdings Common Unit Exchanges | 22,235 |  |
Amortization | (17,586) |  |
Deferred tax assets, ending | 434,213 |  |
Amounts payable under tax receivable agreements |  |  |
Amounts payable under tax receivable, beginning agreements | 375,324 |  |
Establishment of amounts payable under tax receivable agreements | 37,110 | $ 8,894 |
Payment under the tax receivable agreements | (20,318) | $ (19,009) |
Amounts payable under tax receivable, ending agreements | 392,116 |  |
Unrecognized tax benefits, income tax penalties accrued | 300 |  |
Unrecognized tax benefits | $ 1,500 |  | $ 2,000
Statutory tax rate | 21.00% |  |
Capital Unit |  |  |
Amounts payable under tax receivable agreements |  |  |
Establishment of amounts payable under tax receivable agreements | $ 18,899 |  |
LIBOR |  |  |
Tax receivable, basis point spread on variable rate (as a percent) | 100 |  |

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