Inventories (Tables)

6 Months Ended

Jun. 30, 2012

Inventories [Abstract]

Summary of inventories, at LIFO value

	June 30, 2012			December 31, 2011
Finished goods	$	22,055		$	29,980
Raw materials		18,721			27,134
Total FIFO inventories		40,776			57,114
Reserve to adjust inventories to LIFO value		(27,338	)		(28,218	)
Total LIFO inventories	$	13,438		$	28,896