Basis and Summary of Significant Accounting Policies - Accounts Receivable Net of Allowances (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	$ 92,161	$ 95,777
Customers
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	41,883	36,227
Corporate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	26,853	26,375
Franchisee
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	$ 23,425	$ 33,175