Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2015

Fair Value Measurements [Abstract]

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

10. Fair Value Measurements - continued
				As of September 30, 2015
	(Amounts in thousands)			Total		Level 1		Level 2		Level 3
		Marketable securities		$	41,119	$	41,119	$	-	$	-
			Total assets	$	41,119	$	41,119	$	-	$	-
				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 [Table Text Block]

		As of September 30, 2015				As of December 31, 2014
		Carrying		Fair		Carrying		Fair
(Amounts in thousands)		Amount		Value		Amount		Value
Assets:
	Cash equivalents	$	221,539	$	221,539	$	111,590	$	111,590
Liabilities:
	Mortgages payable	$	1,060,408	$	1,054,200	$	1,032,780	$	1,025,000
	Leasing commissions (included in amounts due to Vornado)		15		15		-		-
		$	1,060,423	$	1,054,215	$	1,032,780	$	1,025,000