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Financial Instruments and Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2017

Fair Value Disclosures [Abstract]

Debt Instruments with Carrying Values Different than Estimated Fair Values

Debt instruments with carrying values that are different than estimated fair values are summarized as follows (in thousands):

	September 30, 2017								December 31, 2016
	Carrying Amount				Fair Value				Carrying Amount				Fair Value
Senior Notes	$	2,809,404			$	2,896,258			$	2,913,217			$	3,056,896
Revolving Credit Facilities and term loans		457,858				460,782				598,242				601,131
Mortgage Indebtedness		750,269				771,052				982,509				1,012,869
	$	4,017,531			$	4,128,092			$	4,493,968			$	4,670,896

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- Definition

Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements.

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