Debt (Tables)

6 Months Ended

Jun. 30, 2016

Debt Disclosure [Abstract]

Schedule of debt and lines of credit

Debt consists of the following ($ in thousands):

	June 30, 2016			December 31, 2015			Weighted Average Maturity In Years
Unsecured bonds private placement - fixed rate	$	314,067		$	463,891		4.1
Term loan - variable rate	224,635			224,467			0.4
Bonds public offering - fixed rate	2,839,026			2,400,322			6.8
Unsecured debt, net (1)	3,377,728			3,088,680
Lines of credit, net (2)	—			11,707
Mortgage notes payable, net (3)	2,240,558			2,215,077			5.3
Total debt, net	$	5,618,286		$	5,315,464
Weighted average interest rate on fixed rate unsecured and unsecured private placement bonds	3.6		%	3.6		%
Weighted average interest rate on variable rate term loan	2.4		%	2.4		%
Weighted average interest rate on lines of credit	1.9		%	1.9		%
Weighted average interest rate on mortgage notes payable	4.4		%	4.4		%

(1) Includes unamortized premium and discounts of $5.7 million and $14.3 million and reduced by unamortized debt issuance costs of $18.0 million and $15.6 million, as of June 30, 2016 and December 31, 2015, respectively.

(2) Lines of credit, net, related to the Company's two lines of unsecured credit aggregating $1.0 billion, excludes unamortized debt issuance costs of $3.8 million as of June 30, 2016 as the net effect resulted in a negative debt balance and as such the amount was reclassified to prepaid expenses and other assets on the condensed consolidated balance sheets. The December 31, 2015 amount includes $3.3 million of unamortized debt issuance costs because the net balance resulted in a positive debt balance and is presented on a net basis.

(3) Includes unamortized premium of $59.9 million and $64.8 million and reduced by unamortized debt issuance costs of $7.6 million and $8.0 million, as of June 30, 2016 and December 31, 2015, respectively.

Summary of aggregate scheduled principal payments

The aggregate scheduled principal payments of the Company’s outstanding debt as of June 30, 2016 are as follows (excluding lines of credit) (in thousands):

Remaining in 2016	$	215,402
2017	564,851
2018	321,328
2019	661,954
2020	693,868
Thereafter	3,120,852
	$	5,578,255