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Fair Value Measurements - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Aug. 13, 2015
Dec. 12, 2014
Sep. 26, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Fair value measurements assets, significant transfers from level 1 to level 2 $ 0 $ 0        
Fair value measurements assets, significant transfers from level 2 to level 1 0 0        
Fair value measurements liabilities, significant transfers from level 1 to level 2 0 0        
Fair value measurements liabilities, significant transfers from level 2 to level 1 0 0        
Asset impairment recorded     $ 8,615,000      
Senior notes 790,400,000 789,100,000        
Carrying value of notes payable on real estate 26,000,000 38,300,000        
Non-controlling Interests [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Impairment of investments in unconsolidated subsidiaries     800,000      
Provision for loss on real estate     1,800,000      
Fair Value, Measurements, Non-recurring [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Asset impairment recorded 0 0 8,615,000      
Impairment of investments in unconsolidated subsidiaries     3,628,000      
Impairment of real estate     $ 1,909,000      
Senior term loans [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Estimated fair value of senior loans 751,400,000 878,600,000        
Senior term loans 744,300,000 877,900,000        
5.00% Senior Notes [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Estimated fair value of senior loans $ 827,600,000 $ 802,600,000        
Interest rate of long-term debt 5.00% 5.00%        
Senior notes $ 790,400,000 $ 789,100,000        
5.00% Senior Notes [Member] | Senior Notes [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Interest rate of long-term debt 5.00% 5.00%        
4.875% Senior Notes [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Estimated fair value of senior loans $ 607,000,000 $ 598,800,000        
Interest rate of long-term debt 4.875% 4.875%   4.875%    
Senior notes $ 591,200,000 $ 590,500,000        
4.875% Senior Notes [Member] | Senior Notes [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Interest rate of long-term debt 4.875% 4.875%   4.875%    
5.25% Senior Notes [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Estimated fair value of senior loans $ 439,300,000 $ 430,400,000        
Interest rate of long-term debt 5.25% 5.25% 5.25%   5.25% 5.25%
Senior notes $ 422,200,000 $ 422,000,000        
5.25% Senior Notes [Member] | Senior Notes [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Interest rate of long-term debt 5.25% 5.25%        
Senior notes $ 426,500,000 $ 426,682,000