Accounts payable, accrued expenses, and tenant security deposits (Tables)

12 Months Ended

Dec. 31, 2013

Payables and Accruals [Abstract]

Summary of components of accounts payable, accrued expenses, and tenant security deposits

The following table summarizes the components of accounts payable, accrued expenses, and tenant security deposits as of December 31, 2013 and 2012 (in thousands):

	December 31,
	2013		2012
Accounts payable and accrued expenses	$	98,037	$	105,520
Accrued construction	78,098		83,104
Acquired below market leases	11,405		14,721
Conditional asset retirement obligations	7,386		9,240
Deferred rent liability	35,134		34,414
Interest rate swap liabilities	6,191		20,661
Prepaid rent and tenant security deposits	188,241		143,878
Other liabilities	10,850		12,170
Total	$	435,342	$	423,708