Interest and Other Income, net - Schedule Of Interest And Other (Loss) Income, net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Interest And Other Income [Abstract]
Preferred equity investment income	$ 917	$ 953	$ 1,816	$ 2,366
Interest and other income	978	511	2,004	596
Mark-to-market of investments in our deferred compensation plans	199	1,022	290	2,724
Total interest and other (loss) income, net	$ 2,094	$ 2,486	$ 4,110	$ 5,686