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