Segment Information (Revenue and Long-term Assets by Geographic Location) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Geographical [Line Items]
Inventory	$ 89,907		$ 89,907		$ 80,424
Net sales	$ 59,919	$ 56,237	$ 191,341	$ 179,106
Total sales, % Inc/Decr	6.50%		6.80%
Domestic [Member]
Geographical [Line Items]
Long lived assets, gross	$ 170,170		$ 170,170		161,672
Accumulated depreciation and amortization	(91,019)		(91,019)		(88,958)
Long lived assets, net	79,151		79,151		72,714
Inventory	55,000		55,000		43,725
Net sales	$ 42,242	40,719	$ 131,427	123,262
Total sales, % Inc/Decr	3.70%		6.60%
International [Member]
Geographical [Line Items]
Long lived assets, gross	$ 63,255		$ 63,255		53,859
Accumulated depreciation and amortization	(23,982)		(23,982)		(19,391)
Long lived assets, net	39,273		39,273		34,468
Inventory	34,907		34,907		$ 36,699
Net sales	$ 17,677	$ 15,518	$ 59,914	$ 55,844
Total sales, % Inc/Decr	13.90%		7.30%