Basis and Summary of Significant Accounting Policies - Related Party Transactions (Details) - Related Party $ in Millions |
6 Months Ended | 36 Months Ended |
|---|---|---|
|
Jun. 30, 2019
USD ($)
lease
|
Dec. 31, 2004
property
|
|
| Related Party Transaction [Line Items] | ||
| Sale leaseback, number of properties | property | 21 | |
| Number of operating leases | lease | 3 | |
| Interest rate in the leases | 9.70% | |
| Operating leases, annual rental payments | $ | $ 0.2 |