Segment Reporting (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Net Sales:
Total net sales	$ 235,710	$ 262,267
Non-Current Assets:
Total non-current assets	281,375		281,637
North America [Member]
Net Sales:
Total net sales	153,099	170,123
Non-Current Assets:
Total non-current assets	80,372		82,777
South America [Member]
Net Sales:
Total net sales	42,429	53,691
Non-Current Assets:
Total non-current assets	185,507		185,109
Europe and Other [Member]
Net Sales:
Total net sales	40,182	38,453
Non-Current Assets:
Total non-current assets	$ 15,496		$ 13,751