Accounts Receivable Net of Allowances (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net of allowances	$ 67,573	$ 87,471
Customers
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net of allowances	6,934	5,384
Corporate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net of allowances	22,430	29,650
Franchisee
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net of allowances	$ 38,209	$ 52,437