Basis and Summary of Significant Accounting Policies - Accounts Receivable Net of Allowances (Details) - USD ($) $ in Thousands |
Jun. 30, 2020 |
Dec. 31, 2019 |
|---|---|---|
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Accounts Receivable | $ 79,933 | $ 104,159 |
| Customers | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Accounts Receivable | 57,134 | 76,819 |
| Corporate | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Accounts Receivable | 12,141 | 14,109 |
| Franchisee | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Accounts Receivable | $ 10,658 | $ 13,231 |