Fair Value Measurements - Schedule of Carrying Values and Estimated Fair Values (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior Notes	$ 1,646,496	$ 1,646,007
Revolving Credit Facilities and term loans	89,676	149,655
Mortgage Indebtedness	87,992	88,743
Total indebtedness	1,824,164	1,884,405
Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior Notes	1,676,784	1,639,827
Revolving Credit Facilities and term loans	90,323	150,533
Mortgage Indebtedness	89,241	89,228
Total indebtedness	$ 1,856,348	$ 1,879,588