Acquisitions and Dispositions - Acquisitions (Details) - The Other Art Fair [Member] $ in Millions |
Jul. 07, 2016
GBP (£)
|
Jul. 07, 2016
USD ($)
|
|---|---|---|
| Business Acquisition [Line Items] | ||
| Purchase consideration, cash | £ 1,100,000 | $ 1.5 |
| Deferred consideration | £ 315,000 | |
| Consideration payable, term | 3 years | 3 years |