DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Life Insurance Contracts (Details) $ in Millions	Dec. 31, 2016 USD ($) contract	Dec. 26, 2015 USD ($) contract
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of life insurance contracts \| contract	43	42
Face value of life insurance contracts \| $	$ 61.4	$ 60.5

Face value (death benefits) of the life insurance policies underlying the life settlement contracts accounted for under the investment method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Life Settlement Contract
-URI http://asc.fasb.org/extlink&oid=6516907

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 325
-SubTopic 30
-Section 50
-Paragraph 4
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=73718008&loc=d3e42674-111610

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