Benefit Plans - Sirius XM Holdings Inc. Deferred Compensation Plan (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Retirement Benefits [Abstract] | |||
| Deferred compensation contributions | $ 7,605 | $ 7,628 | $ 4,295 |
| Fair value of investment assets related to deferred compensation plan | 21,860 | 14,641 | |
| Unrealized gains (losses) on investments | $ 0 | $ 0 | |
| X | ||||||||||
- Definition Deferred Compensation Arrangement with Individual, Unrealized Gain (Loss) on Investment No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of contributions made by employer into fund established for purposes of making future disbursement to individual in accordance with deferred compensation arrangement. No definition available.
|
| X | ||||||||||
- Definition Carrying amount as of the balance sheet date of assets held under deferred compensation agreements. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|