Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Abstract]
Total revenues	$ 379,409	$ 423,552	$ 442,083	$ 367,169	$ 235,642	$ 205,480	$ 206,501	$ 181,055	$ 1,612,213	$ 828,678	$ 769,317
San Francisco, CA
Disaggregation of Revenue [Abstract]
Total revenues									319,195	193,708	179,248
Boston, MA
Disaggregation of Revenue [Abstract]
Total revenues									273,669	85,676	73,461
San Diego, CA
Disaggregation of Revenue [Abstract]
Total revenues									243,598	78,965	69,447
Los Angeles, CA
Disaggregation of Revenue [Abstract]
Total revenues									200,398	128,016	124,979
Other
Disaggregation of Revenue [Abstract]
Total revenues									128,627	108,583	111,549
Southern FL
Disaggregation of Revenue [Abstract]
Total revenues									115,600	63,824	50,916
Washington DC
Disaggregation of Revenue [Abstract]
Total revenues									111,552	34,731	27,586
Portland, OR
Disaggregation of Revenue [Abstract]
Total revenues									105,571	98,265	100,070
Chicago, IL
Disaggregation of Revenue [Abstract]
Total revenues									82,690	3,885	0
Seattle, WA
Disaggregation of Revenue [Abstract]
Total revenues									$ 31,313	$ 33,025	$ 32,061