Debt (Tables)

12 Months Ended

Dec. 31, 2015

Debt [Abstract]

Schedule of debt

Long-term debt and capital and financing lease obligations consist of the following (dollars in thousands):

	December 31,
	2015		2014
Mortgage notes payable due 2016 through 2047; weighted average interest rate of 4.51% in 2015, including net debt premium and deferred financing costs of $3.3 million in 2015 and including net debt premium and deferred financing costs of $42.9 million in 2014 (weighted average interest rate of 4.84% in 2014)	$	3,246,513	$	3,088,752
Capital and financing lease obligations payable through 2031; weighted average interest rate of 8.11% in 2015 (weighted average interest rate of 8.57% in 2014)		2,489,588		2,649,226
Convertible notes payable in aggregate principal amount of $316.3 million, less debt discount and deferred financing costs of $34.3 million and $46.9 million in 2015 and 2014, respectively, interest at 2.75% per annum, due June 2018		281,902		269,300
Construction financing due 2017 through 2019; weighted average interest rate of 4.84% in 2015 (weighted average interest rate of 4.90% in 2014)		24,105		50,118
Notes payable issued to finance insurance premiums (weighted average interest rate of 2.82% in 2014)		—		22,586
Other notes payable, weighted average interest rate of 5.16% in 2015 (weighted average interest rate of 4.75% in 2014) and maturity dates ranging from 2016 to 2020		80,305		66,271
Total debt and capital and financing lease obligations		6,122,413		6,146,253
Less current portion		235,604		268,399
Total long-term debt and capital and financing lease obligations	$	5,886,809	$	5,877,854

As of December 31, 2015, the current portion of long-term debt within the Company's consolidated financial statements includes $60.8 million of mortgage notes payable secured by assets held for sale. This debt will either be assumed by the prospective purchasers or be repaid with the proceeds from the sales. Refer to Note 4 for more information about the Company's assets held for sale.

Annual aggregate scheduled maturities of long-term debt obligations outstanding

The annual aggregate scheduled maturities of long-term debt and capital and financing lease obligations outstanding as of December 31, 2015 are as follows (dollars in thousands):

Year Ending December 31,	Long-term Debt			Capital and Financing Lease Obligations			Total Debt
2016	$	180,423		$	237,810		$	418,233
2017		308,023			263,671			571,694
2018		1,179,702			282,951			1,462,653
2019		143,473			262,800			406,273
2020		490,605			207,594			698,199
Thereafter		1,361,903			3,629,265			4,991,168
Total obligations		3,664,129			4,884,091			8,548,220
Less amount representing debt discount and deferred financing costs, net		(31,304	)		—			(31,304	)
Less amount representing interest (weighted average interest rate of 8.11%)		—			(2,394,503	)		(2,394,503	)
Total	$	3,632,825		$	2,489,588		$	6,122,413

Interest expense associated with the convertible notes

The interest expense associated with the Notes (excluding amortization of the associated deferred financing costs) was as follows (dollars in thousands):

	For the Years Ended December 31,
	2015			2014			2013
Coupon interest		$	8,697		$	8,697	$	8,697
Amortization of discount			11,732			10,902		10,131
Interest expense related to convertible notes		$	20,429		$	19,599	$	18,828

Summary of swap and cap instruments

Current notional balance	$	983,281
Weighted average fixed cap rate		4.34	%
Earliest maturity date		2016
Latest maturity date		2018
Estimated asset fair value (included in other assets, net at December 31, 2015)	$	29
Estimated asset fair value (included in other assets, net at December 31, 2014)	$	763