Indebtedness (Tables)

12 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

Indebtedness at December 31, 2015 and 2014 consists of the following (in thousands):

	Maturity Date	Weighted Average Interest Rate		Weighted Average Interest Rate
		2015		2014		2015		2014
Fixed rate secured debt	2016 to 2027	6.55	%	6.27	%	$	736,896	$	979,842
Variable rate secured debt	2025	0.03	%	0.13	%	3,100		3,400
Unsecured debt	2016 to 2028	4.63	%	5.22	%	2,530,743		3,364,161
Unsecured line of credit	2019	1.41	%	1.22	%	71,000		106,000
						$	3,341,739	$	4,453,403
Less secured debt related to real estate assets held-for-sale						—		40,764
Total indebtedness as reported on consolidated balance sheets						$	3,341,739	$	4,412,639

Unsecured Lines of Credit

Our unsecured line of credit at December 31, 2015 is described as follows (in thousands):

				Outstanding Balance at
Description	Borrowing Capacity		Maturity Date	December 31, 2015
Unsecured Line of Credit – Partnership	$	1,200,000	January 2019	$	71,000

Fair Value, Liabilities Measured on a Recurring Basis, Disclosure Only

As all of our fair value debt disclosures relied primarily on Level 3 inputs, the following table summarizes the book value and changes in the fair value of our debt for the year ended December 31, 2015 (in thousands): 

	Book Value at 12/31/2014		Book Value at 12/31/2015		Fair Value at 12/31/2014		Payments/Payoffs			Adjustments to Fair Value			Fair Value at 12/31/2015
Fixed rate secured debt	$	979,842	$	736,896	$	1,065,301	$	(241,114	)	$	(35,092	)	$	789,095
Variable rate secured debt	3,400		3,100		3,400		(300		)	—			3,100
Unsecured debt	3,364,161		2,530,743		3,603,475		(833,417		)	(145,263		)	2,624,795
Unsecured line of credit	106,000		71,000		106,000		(35,000		)	(148		)	70,852
Total	$	4,453,403	$	3,341,739	$	4,778,176	$	(1,109,831	)	$	(180,503	)	$	3,487,842
Less secured debt related to real estate assets held-for-sale	40,764		—
Total indebtedness as reported on consolidated balance sheets	$	4,412,639	$	3,341,739

Schedule of Maturities of Long-term Debt

Scheduled Maturities and Interest Paid

At December 31, 2015, the scheduled amortization and maturities of all indebtedness, excluding fair value and other accounting adjustments, for the next five years and thereafter were as follows (in thousands):

Year	Amount
2016	$	357,037
2017	350,295
2018	293,379
2019	725,912
2020	134,041
Thereafter	1,480,252
	$	3,340,916