Acquisitions - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Jun. 30, 2018	Jun. 01, 2018	Mar. 31, 2018	Dec. 31, 2017	Nov. 03, 2017
Business Acquisition [Line Items]
Goodwill	$ 0			$ 0	$ 26,070
Fitlosophy, Inc.
Business Acquisition [Line Items]
Accounts receivable			$ 389
Inventory			452
Other assets			5
Total current assets			846
Intangible assets			2,032
Goodwill		$ 1,390
Total assets acquired			4,268
Current liabilities			(168)
Net assets acquired			$ 4,100
Simplicity Creative Group
Business Acquisition [Line Items]
Cash						$ 1,889
Accounts receivable						11,787
Inventory						31,651
Other assets						1,289
Total current assets						46,616
Property, plant and equipment						14,975
Intangible assets						22,282
Goodwill						6,154
Other						211
Total assets acquired						90,238
Current liabilities						(16,782)
Long-term debt						17
Other long-term liabilities						4,523
Total liabilities assumed						21,322
Net assets acquired						$ 68,916