Leases - Balance Sheet Classification of Lease Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Jan. 01, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018
Operating Leases
Right-of-use assets, net	$ 34,960	$ 23,333	$ 22,097	$ 19,793	$ 21,200	$ 0	$ 0	$ 0
Current liabilities	7,620	5,485	4,851	4,456		0	0	0
Non-current liabilities	29,414	$ 19,192	$ 18,567	$ 16,538		$ 0	$ 0	$ 0
Total operating lease liabilities	37,034				22,200
Finance Leases
Right-of-use assets	1,135
Accumulated depreciation	(343)
Right-of-use assets, net	792
Current liabilities	354
Non-current liabilities	398
Total finance lease liabilities	$ 752
Weighted Average Remaining Lease Term
Operating leases	5 years
Finance leases	2 years 9 months
Weighted Average Discount Rate
Operating leases	9.10%
Finance leases	7.20%
Before Adoption
Operating Leases
Right-of-use assets, net					$ 21,200
After Adoption
Operating Leases
Right-of-use assets, net	$ 18,600
Finance Leases
Accumulated depreciation	$ (4,800)