Commitments and Contingencies (Details)		6 Months Ended
	Feb. 27, 2013 USD ($)	Jun. 30, 2016 CAD	Jun. 30, 2016 USD ($)	Dec. 31, 2015 USD ($)	Oct. 26, 2010 $ / violation
Other Commitments [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			$ 71,200,000
Fair value of franchise related borrowings			1,200,000
Loan facility to franchisees, maximum commitment amount			175,000,000.0
Loss contingency accrual			5,100,000
Reserve for unfunded loan commitments			505,000
Unused credit card lines
Other Commitments [Line Items]
Remaining credit available			390,500,000	$ 378,700,000
Minimum
Other Commitments [Line Items]
Loss Contingency, Estimate of Possible Loss			479,000
Range of possible loss not accrued			0
Maximum
Other Commitments [Line Items]
Loss Contingency, Estimate of Possible Loss			2,500,000
Range of possible loss not accrued			$ 3,500,000
Amendment | Franchise Loan Facility
Other Commitments [Line Items]
Loan facility maximum Canadian sub facility commitment amount | CAD		CAD 50,000,000
Margaret Korrow
Other Commitments [Line Items]
Statutory Penalty Damages, Per Violation | $ / violation					100
Lomi Price | Maximum
Other Commitments [Line Items]
Loss Contingency, Damages Sought, Value	$ 250,000