Unsecured Debt (Tables)

12 Months Ended

Dec. 31, 2020

Debt Disclosure [Abstract]

Schedule of Unsecured Debt

Unsecured debt consists of the following as of December 31, 2020 and 2019 ($ in thousands):

	2020			2019			Weighted Average Maturity In Years
Unsecured bonds private placement - fixed rate	$	199,950		$	199,820		0.5
Term loan - variable rate	549,380			349,189			1.5
Bonds public offering - fixed rate	4,858,655			4,214,197			9.4
Unsecured debt, net (1)	5,607,985			4,763,206
Lines of credit (2)	—			55,000
Total unsecured debt	$	5,607,985		$	4,818,206
Weighted average interest rate on fixed rate unsecured bonds private placement and bonds public offering	3.4		%	3.8		%
Weighted average interest rate on variable rate term loan	1.7		%	2.7		%
Weighted average interest rate on lines of credit	1.0		%	2.5		%

(1)Includes unamortized discount, net of premiums, of $10.1 million and $12.2 million and unamortized debt issuance costs of $31.9 million and $24.5 million as of December 31, 2020 and 2019, respectively.

(2)Lines of credit, related to the Company's two lines of unsecured credit aggregating $1.24 billion, excludes unamortized debt issuance costs of $3.7 million and $3.8 million as of December 31, 2020 and 2019, respectively. These debt issuance costs are included in prepaid expenses and other assets on the consolidated balance sheets.

Summary of Unsecured Private Placement Bonds

The following is a summary of the Company’s unsecured private placement bonds as of December 31, 2020 and 2019 ($ in thousands):

	Maturity	2020		2019		Coupon Rate
Senior unsecured private placement notes	April 2021	100,000		100,000		4.27	%
Senior unsecured private placement notes	June 2021	50,000		50,000		4.30	%
Senior unsecured private placement notes	August 2021	50,000		50,000		4.37	%
		$	200,000	$	200,000

Summary of Senior Unsecured Notes

The following is a summary of the Company’s senior unsecured notes as of December 31, 2020 and 2019 ($ in thousands):

	Maturity	2020		2019		Coupon Rate
Senior notes	March 2021	$	—	$	300,000	5.200	%
Senior notes	August 2022	—		300,000		3.625	%
Senior notes	January 2023	300,000		300,000		3.375	%
Senior notes	May 2023	300,000		300,000		3.250	%
Senior notes	May 2024	400,000		400,000		3.875	%
Senior notes	April 2025	500,000		500,000		3.500	%
Senior notes	April 2026	450,000		450,000		3.375	%
Senior notes	May 2027	350,000		350,000		3.625	%
Senior notes	March 2029	500,000		500,000		4.000	%
Senior notes	January 2030	550,000		550,000		3.000	%
Senior notes	January 2031	300,000		—		1.650	%
Senior notes	March 2032	650,000		—		2.650	%
Senior notes	March 2048	300,000		300,000		4.500	%
Senior notes	September 2050	300,000		—		2.650	%
		$	4,900,000	$	4,250,000

Mortgage notes payable consist of the following as of December 31, 2020 and 2019 ($ in thousands):

	2020			2019
Fixed rate mortgage notes payable	$	419,323		$	736,490
Variable rate mortgage notes payable (1)	224,227			254,177
Total mortgage notes payable (2)	$	643,550		$	990,667
Number of properties securing mortgage notes	12			24
Remaining terms	1-26 years			1-27 years
Weighted average interest rate	2.7		%	4.1		%

Schedule of Unsecured Debt Principal Payments Excluding Lines of Credit

The aggregate scheduled principal payments of unsecured debt payable, excluding lines of credit, at December 31, 2020 are as follows ($ in thousands):

2021	$	—
2022	—
2023	600,000
2024	400,000
2025	500,000
Thereafter	3,400,000
	$	4,900,000

The aggregate scheduled principal payments of mortgage notes payable at December 31, 2020 are as follows ($ in thousands):

2021	$	3,501
2022	43,188
2023	2,945
2024	3,109
2025	133,054
Thereafter	455,629
	$	641,426

(1)Variable rate mortgage notes payable, including $225.1 million in bonds that have been converted to variable rate through total return swap contracts, consists of multifamily housing mortgage revenue bonds secured by deeds of trust on rental properties and guaranteed by collateral pledge agreements, payable monthly at a variable rate as defined in the Loan Agreement (approximately 1.2% at December 2020 and 2.3% at December 2019) including credit enhancement and underwriting fees. Among the terms imposed on the properties, which are security for the bonds, is a requirement that 20% of the apartment homes are subject to tenant income criteria. Once the bonds have been repaid, the properties may no

longer be obligated to comply with such tenant income criteria. Principal balances are due in full at various maturity dates from December 2027 through December 2046. The Company had no interest rate cap agreements as of December 31, 2020 and 2019, respectively.

(2)Includes total unamortized premium, net of discounts, of $3.9 million and $5.9 million and reduced by unamortized debt issuance costs of $1.8 million and $2.6 million as of December 31, 2020 and 2019, respectively.