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Acquisition - Estimated fair value of the assets acquired and liabilities (Details) - USD ($) $ in Thousands	Jul. 06, 2017	Sep. 30, 2018	Jun. 30, 2018
Recognized amounts of identifiable assets acquired and (liabilities assumed), at fair value:
Goodwill		$ 32,061	$ 32,230
Cobalt Boats, LLC
Consideration:
Cash consideration paid	$ 129,525
Equity consideration paid	1,000
Fair value of total consideration transferred	130,525
Recognized amounts of identifiable assets acquired and (liabilities assumed), at fair value:
Cash	3,973
Accounts receivable	2,329
Inventories	14,343
Other current assets	363
Property, plant and equipment	12,934
Identifiable intangible assets	89,900
Current liabilities	(13,108)
Fair value of assets acquired and liabilities assumed	110,734
Goodwill	19,791
Total purchase price	$ 130,525