Unsecured line of credit and unsecured term loans (Tables)

6 Months Ended

Jun. 30, 2011

Unsecured line of credit and unsecured term loans

Summary of balances outstanding unsecured line of credit and unsecured term loans

	June 30,		December 31,
	2011		2010
Unsecured line of credit	$	575,000	$	748,000
2012 Unsecured Term Loan	250,000		750,000
2016 Unsecured Term Loan	750,000		–
	$	1,575,000	$	1,498,000

Summary of financial covenants

Covenant	Requirement
Leverage Ratio	Less than or equal to 60.0%
Unsecured Leverage Ratio	Less than or equal to 60.0%
Fixed Charge Coverage Ratio	Greater than or equal to 1.5
Unsecured Debt Yield	Greater than or equal to 11.00% until June 30, 2011, and 12.00% thereafter
Minimum Book Value	Greater than or equal to the sum of $2.0 billion and 50% of the net proceeds of equity offerings after January 28, 2011
Secured Debt Ratio	Less than or equal to 40.0%