Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended				12 Months Ended			12 Months Ended							12 Months Ended
	Dec. 31, 2013 Segment	Dec. 31, 2012	Dec. 31, 2011	May 31, 2013	Dec. 31, 2013 Nonrecurring	Dec. 31, 2012 Nonrecurring	Dec. 31, 2013 Residential Mortgage Operation	Dec. 31, 2013 Software and Software Development Costs	Dec. 31, 2013 Accounts receivable	Dec. 31, 2012 Accounts receivable	Dec. 31, 2013 Annual Dues	Dec. 31, 2012 Annual Dues	Dec. 31, 2011 Annual Dues	Dec. 31, 2010 Annual Dues	Dec. 31, 2013 Franchise Agreements	Dec. 31, 2012 Franchise Agreements	Dec. 31, 2011 Franchise Agreements
Significant Accounting Policies [Line Items]
Percentage of common membership units in subsidiaries	39.56%
Deferred annual dues revenue											$ 12,344,000	$ 11,599,000	$ 11,874,000	$ 12,212,000
Deferred revenue recognized	23,574,000	22,629,000	19,354,000												9,014,000	9,392,000	7,369,000
Accounts and notes receivable interest rate description									The Company provides limited financing of certain franchise sales through the issuance of notes receivable that either bear interest at a rate of prime plus 2% or at a stated amount, which is fixed at the inception of the note with the associated earnings recorded in “Interest income” in the accompanying Consolidated Statements of Income and Comprehensive Income. Amounts collected on notes receivable are included in “Net cash provided by operating activities” in the Consolidated Statements of Cash Flows.
Accounts and notes receivable interest rate percentage									2.00%
Deferred revenue, additions									1,292,000	1,820,000	30,269,000	28,634,000	28,584,000
Recognized revenue	596,000	628,000	376,000								29,524,000	28,909,000	28,922,000
Bad debt expense	604,000	611,000	728,000
Software development costs, estimated useful life								3 years
Asset Impairment Charges	0	0	0
Impairment of goodwill	0	0	0
Percentage of equity method investment				50.00%			50.00%
Fair value adjustments					$ 0	$ 0
Number of countries in which entity operates	United States, Canada and 95 other countries
Number of reportable segments	2