Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred income tax assets:
Inventory basis difference	$ 1,475	$ 1,464
Accounts receivable reserve	299	320
Stock based compensation	614	518
Pension liability	3,595	3,839
Employee benefit accrual	459	382
Environmental reserve	0	450
Product liability and warranty reserves	1,120	797
Expenses not deductible for tax purposes	487	0
Foreign net operating loss	1,608	374
State net operating loss	82	279
Other	3	0
Net deferred income tax assets	9,742	8,423
Less: Valuation allowance	(825)	0
Net deferred income tax assets	8,917	8,423
Deferred income tax liabilities:
Inventory basis differences	(253)	(246)
Depreciation	(2,867)	(3,924)
Intangible assets	(1,011)	(710)
Deferred revenue	(135)	(218)
Expenses not deductible for tax purposes	(777)	(397)
Total deferred income tax liabilities	(5,043)	(5,495)
Net deferred income tax assets	$ 3,874	$ 2,928