Business and Summary of Significant Accounting Policies - Accounts Receivable Net of Allowances (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net of allowances	$ 95,777	$ 113,439
Trade Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net of allowances	36,227	35,153
Corporate Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net of allowances	26,375	26,175
Franchisee Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net of allowances	$ 33,175	$ 52,111