Segment Reporting (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Net Sales:
Total net sales	$ 234,265	$ 190,417	$ 496,532	$ 383,461
Long-term Assets:
Total long-term assets	290,808		290,808		307,534
North America [Member]
Net Sales:
Total net sales	159,216	147,608	329,339	300,379
Long-term Assets:
Total long-term assets	84,477		84,477		83,460
South America [Member]
Net Sales:
Total net sales	38,474	0	92,165	0
Long-term Assets:
Total long-term assets	193,002		193,002		210,028
Europe and Other [Member]
Net Sales:
Total net sales	36,575	42,809	75,028	83,082
Long-term Assets:
Total long-term assets	$ 13,329		$ 13,329		$ 14,046