Inventories (Tables)

3 Months Ended

Mar. 31, 2013

Inventories [Abstract]

Summary of inventories, at LIFO value

	March 31, 2013			December 31, 2012
Finished goods	$	23,563		$	23,172
Raw materials		15,190			18,068
Total FIFO inventories		38,753			41,240
Reserve to adjust inventories to LIFO value		(23,719	)		(23,719	)
Total LIFO inventories	$	15,034		$	17,521