Financial Instruments and Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2020

Fair Value Disclosures [Abstract]

Schedule of Carrying Values Different from Estimated Fair Values

Carrying values that are different from estimated fair values are summarized as follows (in thousands):

	December 31, 2020				December 31, 2019
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Senior Notes	$	1,449,613	$	1,549,866	$	1,647,963	$	1,744,581
Revolving Credit Facilities and term loan		234,635		235,000		104,460		105,084
Mortgage Indebtedness		249,260		250,624		94,874		96,276
	$	1,933,508	$	2,035,490	$	1,847,297	$	1,945,941