Basis and Summary of Significant Accounting Policies - Accounts Receivable Net of Allowances (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	$ 87,373	$ 104,159
Customers
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	68,319	76,819
Corporate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	9,844	14,109
Franchisee
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	$ 9,210	$ 13,231