Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred income tax assets:
Inventory basis difference	$ 1,576	$ 1,475
Accounts receivable reserve	201	299
Stock based compensation	904	614
Pension liability	1,604	3,595
Employee benefit accrual	601	459
Product liability and warranty reserves	1,417	1,120
Expenses not deductible for tax purposes	1,064	487
Foreign net operating loss	2,954	1,608
State net operating loss	76	82
Other	34	3
Total deferred income tax assets	10,431	9,742
Less: Valuation allowance	(711)	(825)
Net deferred income tax assets	9,720	8,917
Deferred income tax liabilities:
Inventory basis differences	0	(253)
Depreciation	(3,068)	(2,867)
Intangible assets	(1,277)	(1,011)
Deferred revenue	(66)	(135)
Expenses not deductible for tax purposes	(461)	(777)
Total deferred income tax liabilities	(4,872)	(5,043)
Net deferred income tax assets	$ 4,848	$ 3,874