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Debt - Senior Notes and Other Borrowings (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Mar. 05, 2014
Apr. 16, 2013
Debt Instrument [Line Items]        
Principal $ 1,599,049 $ 1,683,268    
Unamortized Debt Issuance Costs 12,516 14,843    
Carrying Value 1,586,533 1,668,425    
Revolving Credit Facility [Member]        
Debt Instrument [Line Items]        
Principal 0 115,000    
Unamortized Debt Issuance Costs 3,500 5,100    
Carrying Value 0 115,000    
Loans Payable and Other Borrowings [Member]        
Debt Instrument [Line Items]        
Principal 150,485 134,824    
Unamortized Debt Issuance Costs 0 0    
Carrying Value 150,485 134,824    
Mortgage Borrowings [Member]        
Debt Instrument [Line Items]        
Principal 198,564 183,444    
Unamortized Debt Issuance Costs 0 0    
Carrying Value 198,564 183,444    
Senior Notes [Member]        
Debt Instrument [Line Items]        
Principal 1,250,000 1,250,000    
Unamortized Debt Issuance Costs 12,516 14,843    
Carrying Value 1,237,484 1,235,157    
Senior Notes [Member] | 5.25% Senior Notes due 2021 [Member]        
Debt Instrument [Line Items]        
Principal 550,000 550,000    
Unamortized Debt Issuance Costs 5,089 6,287    
Carrying Value $ 544,911 543,713    
Stated interest rate of senior notes (as a percent) 5.25%     5.25%
Senior Notes [Member] | 5.875% Senior Notes due 2023 [Member]        
Debt Instrument [Line Items]        
Principal $ 350,000 350,000    
Unamortized Debt Issuance Costs 3,569 4,160    
Carrying Value $ 346,431 345,840    
Stated interest rate of senior notes (as a percent) 5.875%      
Senior Notes [Member] | 5.625% Senior Notes due 2024 [Member]        
Debt Instrument [Line Items]        
Principal $ 350,000 350,000    
Unamortized Debt Issuance Costs 3,858 4,396    
Carrying Value $ 346,142 $ 345,604    
Stated interest rate of senior notes (as a percent) 5.625%   5.625%