Business and Summary of Significant Accounting Policies - Accounts Receivable Net of Allowances (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net of allowances	$ 113,439	$ 107,383
Trade Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net of allowances	35,153	30,438
Corporate Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net of allowances	26,175	32,572
Franchisee Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net of allowances	$ 52,111	$ 44,373