Commitments and Contingencies (Details)		3 Months Ended
	Feb. 27, 2013 USD ($)	Mar. 31, 2016 CAD	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Oct. 26, 2010 $ / violation
Commitments and Contingencies Disclosure [Line Items]
Event of default, loan due In full, term (in days)		90 days
Portion that company might be obligated to repay in the event franchisees defaulted			$ 74,200,000
Fair value of franchise related borrowings			760,000
Loan facility to franchisees, maximum commitment amount			175,000,000.0
Loss contingency accrual			5,200,000
Minimum range of possible loss			546,000
Maximum range of possible loss			2,600,000
Unused credit card lines
Commitments and Contingencies Disclosure [Line Items]
Remaining credit available			383,900,000	$ 378,700,000
Minimum
Commitments and Contingencies Disclosure [Line Items]
Range of possible loss not accrued			0
Maximum
Commitments and Contingencies Disclosure [Line Items]
Range of possible loss not accrued			$ 3,300,000
Amendment | Franchise Loan Facility
Commitments and Contingencies Disclosure [Line Items]
Loan facility maximum Canadian sub facility commitment amount | CAD		CAD 50,000,000
Margaret Korrow
Commitments and Contingencies Disclosure [Line Items]
Statutory penalty damages (in dollars per violation) | $ / violation					100
Lomi Price | Maximum
Commitments and Contingencies Disclosure [Line Items]
Damages sought, value	$ 250,000