The long term liability associated with the construction in progress costs for our build to suit lease.

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Operating Lease, Remaining Lease Term

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Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

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Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Leases - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Leases - Narrative (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property and equipment, net	$ (32,282)		$ (32,282)		$ (36,050)	$ (61,511)
Accrued expenses and other current liabilities	(49,387)		(49,387)		(8,271)	(10,908)
Lease financing obligations, net of current portion	0		0		0	$ (22,987)
Total operating lease costs	2,144		4,288
Cash payments for operating leases	$ 2,400		$ 4,700
Cash payments for operating leases		$ 2,300		$ 4,800
Weighted average remaining lease term	7 years 2 months 12 days		7 years 2 months 12 days
Weighted average discount rate	5.60%		5.60%
Sublease income	$ 500	$ 500	$ 1,000	$ 1,000
Adjustments Due to Adoption of New Leasing Standard
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property and equipment, net					25,461
Accrued expenses and other current liabilities					2,637
Lease financing obligations, net of current portion					22,987
Adjustments Due to Adoption of New Leasing Standard \| Capitalized facility leases
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property and equipment, net					28,300
Accrued expenses and other current liabilities					1,800
Lease financing obligations, net of current portion					$ 23,000
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Remaining lease terms			1 year
Lease renewal term	3 years		3 years
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Remaining lease terms			11 years
Lease renewal term	5 years		5 years