Acquisition (Narrative) (Details) - USD ($)		3 Months Ended
	Aug. 04, 2015	Sep. 27, 2015	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill			$ 55,947,000	$ 53,391,000
Fred Deeley Imports, Ltd.
Business Acquisition [Line Items]
Total consideration	$ 59,900,000
Goodwill	28,567,000
Goodwill, expected tax deductible amount	28,567,000
Intangible assets, fair value	20,842,000
Integration related costs		$ 3,300,000
Fred Deeley Imports, Ltd. | Distribution Rights
Business Acquisition [Line Items]
Intangible assets, fair value	$ 13,300,000
Intangible asset, weighted average useful life (in years)	2 years
Fred Deeley Imports, Ltd. | Customer Relationships
Business Acquisition [Line Items]
Intangible assets, fair value	$ 7,500,000
Intangible asset, weighted average useful life (in years)	20 years