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Financial Instruments and Fair Value Measurements - Debt Instruments with Carrying Values Different from Estimated Fair Values (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Senior Notes $ 1,647,963 $ 1,646,007
Revolving Credit Facilities and term loan 104,460 149,655
Mortgage indebtedness 94,874 88,743
Total indebtedness 1,847,297 1,884,405
Fair Value [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Senior Notes 1,744,581 1,639,827
Revolving Credit Facilities and term loan 105,084 150,533
Mortgage indebtedness 96,276 89,228
Total indebtedness $ 1,945,941 $ 1,879,588