Accounts Receivable Net of Allowances (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Accounts receivable, net of allowances	$ 67,184	$ 74,157
Customer
Financing Receivable, Impaired [Line Items]
Accounts receivable, net of allowances	5,471	7,840
Corporate
Financing Receivable, Impaired [Line Items]
Accounts receivable, net of allowances	20,662	17,215
Franchise
Financing Receivable, Impaired [Line Items]
Accounts receivable, net of allowances	$ 41,051	$ 49,102