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LEASES - Narrative (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) ft²	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Lessee, Lease, Description [Line Items]
Additional amortization expense	$ 3,692,000
Restructuring	$ 3,510,000	$ 979,000
Square feet under lease | ft²	107,800
Rent expense		11,900,000	$ 5,900,000
Interest expense for finance leases		52,000	14,000
Amortization expense for finance leases		600,000	$ 100,000
Facilities
Lessee, Lease, Description [Line Items]
Restructuring	$ 900,000
2019 Restructuring Initiative
Lessee, Lease, Description [Line Items]
Additional amortization expense	3,700,000
Restructuring	3,101,000	0
2019 Restructuring Initiative | Facilities
Lessee, Lease, Description [Line Items]
Restructuring	$ 991,000	$ 0

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- Definition

Operating Lease, Area of Lease

+ References

No definition available.

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X

- Definition

The charge for the use of long-lived depreciable capital leased assets for the period.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 840
-Section 55
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- Definition

The financing charge for leasing arrangements meeting the criteria for capitalization.

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- Definition

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.

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount of accelerated depreciation charged against earnings associated with exit from or disposal of business activities or restructuring plan.

+ References

No definition available.

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