Supplemental Disclosure to Statements of Cash Flows (Tables)

12 Months Ended

Dec. 31, 2015

Supplemental Disclosure to Statements of Cash Flows [Abstract]

Supplemental Disclosure to Statements of Cash Flows

The following are supplemental disclosures to the statements of cash flows for the years ended December 31, 2015, 2014 and 2013 (amounts in thousands):

	2015			2014			2013
Write-off of fully depreciated/amortized property and deferred costs	$	42,339		$	38,131		$	22,269
Write-off of depreciated property and deferred costs due to sale/demolition	252,017			173,083			202,695
Write-off of preferred units costs due to redemption	—			—			1,214
Assumption of mortgage loans in connection with the acquisition of properties	—			—			229,751
Increase in investments in and advances to unconsolidated joint ventures due to disposition/development activity	—			(11,948		)	—
Changes in accrued development capital expenditures	11,964			6,264			17,053
Unrealized (loss) gain on cash flow hedge	(488		)	(3,419		)	1,584