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Fair Value Measurements - Schedule of Carrying Values and Estimated Fair Values (Detail) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Senior Notes $ 1,647,474 $ 1,646,007
Revolving Credit Facilities and term loans 99,417 149,655
Mortgage Indebtedness 86,392 88,743
Total indebtedness 1,833,283 1,884,405
Fair Value [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Senior Notes 1,753,587 1,639,827
Revolving Credit Facilities and term loans 100,179 150,533
Mortgage Indebtedness 88,118 89,228
Total indebtedness $ 1,941,884 $ 1,879,588