Fair Value Disclosures (Tables)

3 Months Ended

Mar. 31, 2017

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

For assets and liabilities measured at fair value on a recurring basis, quantitative disclosure of the fair value for each major category of assets and liabilities is presented below:

	Fair Value Measurements as of March 31, 2017 Using					Fair Value Measurements as of December 31, 2016 Using
Description	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
SPG common shares	$	43,008				$	44,418
Insurance deposit	15,430					15,440
Derivative interest rate contracts (Note 7)			$	22
Total assets	$	58,438	$	22		$	59,858	$	—
Derivative interest rate contracts (Note 7)			$	(2,824	)			$	(3,548	)
Total liabilities			$	(2,824	)			$	(3,548	)

Estimated fair value of notes payable

The estimated fair values of notes payable at March 31, 2017 and December 31, 2016 were as follows:

	2017				2016
	Carrying Value		Fair Value		Carrying Value		Fair Value
Notes payable, net	$	3,287,968	$	3,232,923	$	3,255,512	$	3,184,036