Segment Reporting (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Net Sales:
Total net sales	$ 242,785	$ 234,265	$ 478,495	$ 496,532
Non-Current Assets:
Total non-current assets	258,907		258,907		281,637
North America [Member]
Net Sales:
Total net sales	151,366	159,216	304,465	329,339
Non-Current Assets:
Total non-current assets	78,732		78,732		82,777
South America [Member]
Net Sales:
Total net sales	46,715	38,474	89,144	92,165
Non-Current Assets:
Total non-current assets	166,681		166,681		185,109
Europe and Other [Member]
Net Sales:
Total net sales	44,704	36,575	84,886	75,028
Non-Current Assets:
Total non-current assets	$ 13,494		$ 13,494		$ 13,751