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Acquisition Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 6 Months Ended |
--- | --- | --- | ---
Jul. 06, 2017 | Dec. 31, 2017 | Jun. 30, 2017
Business Acquisition [Line Items] |  |  |
Goodwill |  | $ 32,591 | $ 12,692
Cobalt Boats, LLC |  |  |
Business Acquisition [Line Items] |  |  |
Cash consideration paid | $ 129,525 |  |
Equity consideration paid | $ 1,000 |  |
Business acquisition, share price (in dollars per share) | $ 25.47 |  |
Acquired finite-lived intangible assets, weighted average useful life | 19 years 9 months 18 days |  |
Fair value of total consideration transferred | $ 130,525 |  |
Goodwill | $ 19,791 |  |
Acquisition related costs |  | $ 3,478 |
Common Stock | Class A Common Stock |  |  |
Business Acquisition [Line Items] |  |  |
Issuance of Class A common stock for offerings, net of underwriting discounts (in shares) |  | 2,300,000 |
Common Stock | Cobalt Boats, LLC | Class A Common Stock |  |  |
Business Acquisition [Line Items] |  |  |
Issuance of Class A common stock for offerings, net of underwriting discounts (in shares) | 39,262 |  |
Dealer relationships | Cobalt Boats, LLC |  |  |
Business Acquisition [Line Items] |  |  |
Useful Life (in years) | 20 years |  |
Patent | Cobalt Boats, LLC |  |  |
Business Acquisition [Line Items] |  |  |
Useful Life (in years) | 15 years |  |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e1043-128460 + Details
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
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