Segment Reporting (Net Sales and Long-Term Assets for Each Geographic Area) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Net Sales:
Total net sales	$ 233,511	$ 219,256	$ 712,006	$ 715,788
Non-Current Assets:
Total non-current assets	257,874		257,874		281,637
North America [Member]
Net Sales:
Total net sales	148,805	141,932	453,270	471,270
Non-Current Assets:
Total non-current assets	80,024		80,024		82,777
South America [Member]
Net Sales:
Total net sales	43,626	43,774	132,770	135,939
Non-Current Assets:
Total non-current assets	164,058		164,058		185,109
Europe and Other [Member]
Net Sales:
Total net sales	41,080	33,550	125,966	108,579
Non-Current Assets:
Total non-current assets	$ 13,792		$ 13,792		$ 13,751