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Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 23, 2015 | Mar. 31, 2017 | Sep. 30, 2017
Commitments and Contingencies [Line Items] |  |  |
Loss Contingency, name of plaintiff |  | Baldwin Hackett & Meeks, Inc. |
Loss contingency, damages sought, value | $ 43.8 |  |
Loss contingency, damages awarded, value |  | $ 43.8 |
BHMI judgment and related fees and interest expense |  | $ 2.7 | $ 48.1
General and Administrative Expense [Member] |  |  |
Commitments and Contingencies [Line Items] |  |  |
BHMI judgment and related fees and interest expense |  |  | 46.7
Interest Expense [Member] |  |  |
Commitments and Contingencies [Line Items] |  |  |
BHMI judgment and related fees and interest expense |  |  | $ 1.4

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- Definition Amount awarded to other party in judgment or settlement of litigation. + References No definition available. + Details
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- Definition Amount of damages awarded to the plaintiff in the legal matter. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14557-108349 + Details
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- Definition The value (monetary amount) of the award the plaintiff seeks in the legal matter. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14557-108349 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349 + Details
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