| Component: (Network and Table) | |
|---|---|
| Network | 2426402 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Details) (http://www.cowen.com/role/AccumulatedOtherComprehensiveIncomeLossDetails) |
| Table | (Implied) |
| Reporting Entity [Axis] | 0001466538 (http://www.sec.gov/CIK) |
| Accumulated Other Comprehensive Income / (Loss) [Abstract] | Period [Axis] | ||
|---|---|---|---|
2016-01-01 - 2016-12-31 | 2015-01-01 - 2015-12-31 | 2014-01-01 - 2014-12-31 | |
Accumulated Other Comprehensive Income / (Loss) [Abstract] | |||
Beginning Balance | 0 | ||
Amortization of prior service cost | 0 | 0 | (344,000) |
Foreign currency translation | (2,000) | (17,000) | (231,000) |
Ending Balance | (2,000) | 0 | 17,000 |