Equity Interest Investments (Details) - USD ($) $ in Thousands	Mar. 25, 2017	Dec. 31, 2016	Mar. 19, 2016
Schedule of Equity Method Investments [Line Items]
Current assets	$ 71,880	$ 75,623	$ 77,911
Total assets	145,297	150,761	155,264
Current liabilities	15,070	18,418	18,176
Total liabilities	43,096	49,048	57,514
Stiga Sports AB [Member]
Schedule of Equity Method Investments [Line Items]
Current assets	27,931	28,322	29,018
Non-current assets	9,539	9,379	10,244
Total assets	37,470	37,701	39,262
Current liabilities	3,642	4,847	3,857
Non-current liabilities	5,376	5,133	6,042
Total liabilities	9,018	9,980	9,899
Net assets	$ 28,452	$ 27,721	$ 29,363