Related Party Transactions - Related Party Purchase Agreements (Details) - Tsugaru Holdings [Member] - USD ($) $ in Millions |
Mar. 07, 2018 |
Apr. 21, 2017 |
|---|---|---|
| Related Party Transaction [Line Items] | ||
| Cash Consideration | $ 176.6 | $ 176.6 |
| Debt Assumed | 181.3 | |
| Contingent Consideration | $ 105.9 | $ 105.9 |