Commitments and Contingencies - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013
Commitments and Contingencies Disclosure [Line Items]
Leases of warehouse and retail store space under operating lease, expiring time	2028
Portion that Company might be obligated to repay in the event franchisees defaulted	$ 111,700,000
Fair value of franchise related borrowings	2,200,000
Loss contingency, estimate of probable loss	4,700,000
Minimum range of possible loss	695,000
Maximum range of possible loss	10,600,000
Marketing and Advertising Expense
Commitments and Contingencies Disclosure [Line Items]
Non-cancelable commitments	15,800,000
Vehicles
Commitments and Contingencies Disclosure [Line Items]
Non-cancelable commitments	$ 2,700,000
Kunstmann et al
Commitments and Contingencies Disclosure [Line Items]
Number of Plaintiffs	247
Kurtis Jewell
Commitments and Contingencies Disclosure [Line Items]
Number of employees opted for lawsuit	1,788
Maximum percentage of class size expected to represent class members in lawsuit	7.00%
Minimum
Commitments and Contingencies Disclosure [Line Items]
Renewal options of leases for additional periods	1 year
Maximum
Commitments and Contingencies Disclosure [Line Items]
Renewal options of leases for additional periods	20 years
Leases of transportation and computer equipment under operating leases, expiring period	5 years