Interest and Other Income, net - Schedule Of Interest And Other (Loss) Income, net (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Interest And Other Income [Abstract]
Preferred equity investment income	$ 899	$ 1,413
Interest and other income	1,026	85
Mark-to-market of investments in our deferred compensation plans	91	1,702
Total interest and other (loss) income, net	$ 2,016	$ 3,200

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