Inventories (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Inventory [Line Items]
Liquidation of LIFO layer	$ 2,451,000	$ 0	$ 7,181,000
FIFO inventory amount	70,372,000	61,515,000
Finished goods	169,000	371,000
Work in process	66,528,000	57,397,000
Raw materials and supplies	3,675,000	3,747,000
Housewares/ Small Appliances [Member]
Inventory [Line Items]
LIFO inventory amount	25,031,000	27,394,000
Inventory valuation, difference below FIFO	$ 2,585,000	$ 3,028,000