SEGMENT REPORTING - Schedule of Segment Reporting, Goodwill and Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 30, 2018
Segment Reporting Information [Line Items]
Assets	$ 2,195,706	$ 2,161,702
U.S. \| Reportable Geographical Components
Segment Reporting Information [Line Items]
Assets	1,535,489	1,506,217
U.K. and Europe \| Reportable Geographical Components
Segment Reporting Information [Line Items]
Assets	367,765	359,621
Mexico \| Reportable Geographical Components
Segment Reporting Information [Line Items]
Assets	$ 292,452	$ 295,864

Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e9038-108599

Name:	us-gaap_NoncurrentAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant