Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2015

Fair Value Measurements [Abstract]

Fair Value, Assets Measured on Recurring Basis

		As of December 31, 2015
(Amounts in thousands)		Total		Level 1		Level 2		Level 3
	Marketable securities	$	43,191	$	43,191	$	-	$	-
	Total assets	$	43,191	$	43,191	$	-	$	-
		As of December 31, 2014
(Amounts in thousands)		Total		Level 1		Level 2		Level 3
	Marketable securities	$	44,646	$	44,646	$	-	$	-
	Short-term investments		24,998		24,998		-		-
	Interest rate cap (included in other assets)		11		-		11		-
	Total assets	$	69,655	$	69,644	$	11	$	-

Fair Value, by Balance Sheet Grouping

			As of December 31, 2015				As of December 31, 2014
			Carrying		Fair		Carrying		Fair
(Amounts in thousands)			Amount		Value		Amount		Value
Assets:
	Cash equivalents	$	226,476	$	226,476	$	111,590	$	111,590
Liabilities:
	Mortgages payable (excluding deferred debt issuance costs, net)	$	1,059,587	$	1,054,000	$	1,032,780	$	1,025,000