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Debt Facilities - Mortgage and Loans Payable (Detail) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
Long term debt, gross $ 1,289,455 $ 1,388,524
Less the amount representing debt discount and debt issuance cost (5,195) (6,614)
Add amount representing unamortized mortgage premium 1,736 1,882
Loans payable current and non current 1,285,996 1,383,792
Less current portion (70,789) (73,129)
Loans payable, noncurrent 1,215,207 1,310,663
Term loans [Member]    
Debt Instrument [Line Items]    
Long term debt, gross 1,249,194 1,344,482
Mortgage payable and other loans payable [Member]    
Debt Instrument [Line Items]    
Long term debt, gross $ 40,261 $ 44,042