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Fair Values of Financial Assets and Liabilities Carried at Fair Value (Detail) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Sep. 29, 2017 | Dec. 31, 2017 | Dec. 31, 2016
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Fair values of financial liabilities, beginning balance |  | $ 123,200 |
Settlement through exchange of common shares | $ (1,900) | (1,880) |
Fair values of financial liabilities, ending balance |  | 93,500 | $ 123,200
Assets Held for Sale |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Fair values of financial assets, beginning balance |  | 16,700 | 0
Additions |  | 0 | 17,300
Changes in fair value |  | 0 | (600)
Payments |  | (16,700) | 0
Fair values of financial assets, ending balance |  | 0 | 16,700
Warrant Liability |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Fair values of financial liabilities, beginning balance |  | 7,400 | 0
Additions |  | 0 | 12,800
Changes in fair value |  | (5,500) | (5,400)
Settlement through exchange of common shares |  | (1,900) |
Payments |  | 0 | 0
Fair values of financial liabilities, ending balance |  | $ 0 | $ 7,400

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- Definition Amount of expense (income) related to adjustment to fair value of warrant liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section 25 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6939902&loc=d3e20148-110875 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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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. + Details
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- Definition For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14172-108612 + Details
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- Definition The aggregate fair value as of the balance sheet date of financial instruments and other positions owned by the entity including: (1) mortgages, mortgage-backed and asset backed securities; (2) US government and agency obligations; (3) state and municipal government obligations; (4) other sovereign government debt; (5) corporate obligations; (6) corporate equities; (7) principal investments; (8) derivative contracts; and (9) physical commodities. Includes both pledged and unpledged holdings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35711157&loc=d3e42546-110969 + Details
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