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Investment in Joint Ventures - Additional Information (Detail) (USD $)
3 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended
Sep. 30, 2014
site
Sep. 30, 2013
Sep. 30, 2014
site
Sep. 30, 2013
Dec. 31, 2013
Sep. 30, 2014
Arizona
Voyager Investments
site
Sep. 30, 2013
Arizona
Voyager Investments
Dec. 31, 2013
Arizona
Voyager Investments
Sep. 30, 2014
Other Regions [Member]
ECHO Financing [Member]
site
Sep. 30, 2013
Other Regions [Member]
ECHO Financing [Member]
Dec. 31, 2013
Other Regions [Member]
ECHO Financing [Member]
Apr. 19, 2013
Other Regions [Member]
ECHO Financing [Member]
Sep. 30, 2014
Other Regions [Member]
Meadows Investments
site
Sep. 30, 2013
Other Regions [Member]
Meadows Investments
Dec. 31, 2013
Other Regions [Member]
Meadows Investments
Sep. 30, 2014
Other Regions [Member]
Other Investments
site
Sep. 30, 2013
Other Regions [Member]
Other Investments
Dec. 31, 2013
Other Regions [Member]
Other Investments
Sep. 30, 2014
Florida
Lakeshore Investments
site
Sep. 30, 2013
Florida
Lakeshore Investments
Dec. 31, 2013
Florida
Lakeshore Investments
Sep. 30, 2014
Servicing Assets
Voyager Investments
Sep. 30, 2014
Recreational Vehicle Resort [Member]
Voyager Investments
Jul. 14, 2014
Other Regions [Member]
Other Investments
Sep. 16, 2013
R V Resort [Member]
Sep. 30, 2014
R V Resort [Member]
Auction Properties [Domain]
Schedule of Equity Method Investments [Line Items]                                                    
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax $ 0 $ 40,586,000 $ 0 $ 41,544,000                                            
Business Acquisition, Purchase Price                                                 24,600,000 11,800,000
Equity income from unconsolidated joint ventures 1,237,000 439,000 3,768,000 1,624,000   724,000 720,000   28,000 33,000     1,703,000 856,000   25,000 (188,000)   1,288,000 203,000            
Adjustment Depreciation     700,000 700,000                                            
Distributions from Unconsolidated Joint Ventures, net     3,300,000                                              
Proceeds from Equity Method Investment, Dividends or Distributions     2,869,000 1,251,000                                            
Unconsolidated Joint Venture Distribution in Excess of Basis     2,000,000                                              
Number Of Joint Venture Sites 3,125   3,125     1,706     0       1,077     0     342              
Equity Method Investment, Ownership Percentage           50.00%     50.00%       50.00%     20.00%     65.00%     33.00% 50.00% 20.00%    
Proceeds from Sale of Equity Method Investments 100,000                                                  
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures $ 15,414,000   $ 15,414,000   $ 11,583,000 $ 7,166,000   $ 7,074,000 $ 6,228,000   $ 2,685,000 $ 1,000,000 $ 1,999,000   $ 1,679,000 $ 0   $ 0 $ 21,000   $ 145,000