Inventories (Tables)

12 Months Ended

Dec. 31, 2012

Inventories [Abstract]

Summary of inventories, at LIFO value

	2012			2011
Finished goods	$	23,172		$	29,980
Raw materials		18,068			27,134
Total FIFO inventories		41,240			57,114
Reserve to adjust inventories to LIFO value		(23,719	)		(28,218	)
Total LIFO inventories	$	17,521		$	28,896