Interest and Other Income, net - Schedule Of Interest And Other Income, net (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Interest And Other Income [Abstract]
Preferred equity investment income	$ 953	$ 1,423	$ 2,366	$ 2,839
Interest and other income	511	350	596	430
Mark-to-market of investments in our deferred compensation plans	1,022	(743)	2,724	(539)
Total interest and other income, net	$ 2,486	$ 1,030	$ 5,686	$ 2,730

The amount of interest income and other income recognized during the period. Included in this element is interest derived from investments in debt securities, cash and cash equivalents, and other investments which reflect the time value of money or transactions in which the payments are for the use or forbearance of money and other income from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business).

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration