Commitments and Contingencies - Operating Leases (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Future minimum lease payments under noncancellable operating leases - As Lessor
Remainder of 2019	$ 7,685		$ 7,685
2020	30,135		30,135
2021	29,169		29,169
2022	21,272		21,272
2023	17,208		17,208
2024 and thereafter	34,759		34,759
Total future minimum lease payments	140,228		140,228
Future minimum lease payments under noncancelable operating leases - As Lessee
Remainder of 2019	9,009		9,009
2020	35,731		35,731
2021	35,731		35,731
2022	27,920		27,920
2023	25,316		25,316
2024 and thereafter	45,394		45,394
Total future minimum lease payments	179,101		179,101
Less imputed lease interest	(48,737)		(48,737)
Operating lease obligation	130,364		130,364
Rental expense for all operating lease	7,800	$ 3,900	19,900	$ 11,000
Gross profit on sale leaseback transactions	14,800	6,800	30,900	6,800
Right of use assets obtained in exchange for new operating lease liabilities	38,400	21,700	72,900	23,900
Prepaid rent and security deposit	$ 7,400	$ 5,500	7,400	5,500
Other information of operating leases
Cash payments			$ 19,222	$ 10,617
Weighted average remaining lease term (in years)			5 years 3 months	4 years 1 month 13 days
Weighted average discount rate (as a percent)	12.10%	12.00%	12.10%	12.00%
Minimum
Operating Leases
Lease Term - as Lessor	1 year		1 year
Lease Term - as Lessee	1 year		1 year
Maximum
Operating Leases
Lease Term - as Lessor	7 years		7 years
Lease Term - as Lessee	9 years		9 years
Sale Leaseback Agreements
Future minimum lease payments under noncancelable operating leases - As Lessee
Operating lease obligation	$ 83,200	$ 21,300	$ 83,200	$ 21,300
Short term operating lease obligation	12,000	4,000	12,000	4,000
Long term operating lease obligation	$ 71,200	$ 17,300	$ 71,200	$ 17,300