SEGMENT INFORMATION - Schedule of Total Assets, Tangible Property and Equipment, Depreciation and Amortization and Additions to Tangible Long-lived Assets by Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 793,117	$ 1,157,881
Property, equipment and software, net	56,731	73,581
Depreciation and amortization of property, equipment and software	54,170	63,925	$ 77,792
Additions to tangible long-lived assets	3,888	6,339	4,707
Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Depreciation and amortization of property, equipment and software	62,663	72,819	87,522
Tangible Property and Equipment
Segment Reporting, Asset Reconciling Item [Line Items]
Property, equipment and software, net	8,174	18,809
North America
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	669,336	964,523
Additions to tangible long-lived assets	1,323	1,777	2,000
North America | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Depreciation and amortization of property, equipment and software	52,077	63,725	78,805
North America | United States
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	661,300	951,800
North America | Tangible Property and Equipment
Segment Reporting, Asset Reconciling Item [Line Items]
Property, equipment and software, net	5,246	10,836
International
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	123,781	193,358
Additions to tangible long-lived assets	2,565	4,562	2,707
International | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Depreciation and amortization of property, equipment and software	10,586	9,094	$ 8,717
International | United Kingdom
Segment Reporting, Asset Reconciling Item [Line Items]
Assets		126,000
International | Tangible Property and Equipment
Segment Reporting, Asset Reconciling Item [Line Items]
Property, equipment and software, net	$ 2,928	$ 7,973