Commitments and Contingencies - Operating Leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Operating Leases
Lease Term			6 years
As Lessor
Remainder of 2017	$ 10,152		$ 10,152
2018	20,304		20,304
2019	20,107		20,107
2020	18,951		18,951
2021	14,715		14,715
2022 and Thereafter	6,482		6,482
Total future minimum lease payments	90,711		90,711
As Lessee
Remainder of 2017	6,164		6,164
2018	12,125		12,125
2019	10,936		10,936
2020	9,802		9,802
2021	5,535		5,535
2022 and Thereafter	759		759
Total future minimum lease payments	45,321		45,321
Rental expense and rental income for all operating leases
Rental expense for all operating lease	3,300	$ 3,400	6,600	$ 6,400
Prepaid rent and security deposit	11,500		11,500		$ 11,800
Prepaid expenses and other current assets
Rental expense and rental income for all operating leases
Prepaid rent and security deposit	1,800		1,800		1,900
Other assets
Rental expense and rental income for all operating leases
Prepaid rent and security deposit	$ 9,700		$ 9,700		$ 9,900