Accounts Receivable Net of Allowances (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Accounts receivable, net of allowances	$ 58,473	$ 74,157
Customer
Financing Receivable, Impaired [Line Items]
Accounts receivable, net of allowances	8,297	7,840
Corporate
Financing Receivable, Impaired [Line Items]
Accounts receivable, net of allowances	17,769	17,215
Franchise
Financing Receivable, Impaired [Line Items]
Accounts receivable, net of allowances	$ 32,407	$ 49,102