Interest and Other Income, net - Schedule Of Interest And Other Income, net (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
Interest And Other Income [Abstract]
Preferred equity investment income	$ 1,416
Interest income	80	$ 121
Mark-to-market of investments in our deferred compensation plans	204	733
Total interest and other income	$ 1,700	$ 854

The net amount of operating interest income (expense).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.10)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration