Investments (Equity Method Investments, Summarized Financial Data - Table) (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Italy [Member]
Current assets	$ 202,070		$ 202,070		$ 396,512
Other assets (primarily buildings and equipment)	387,948		387,948		395,264
Current liabilities	98,616		98,616		202,658
Other liabilities (primarily long-term debt)	263,975		263,975		275,466
Net assets	227,427		227,427		313,652
Total revenues	38,516	76,839	121,240	275,112
Gross profit	10,230	14,340	41,955	54,919
Income before income taxes	7,309	11,138	33,232	42,210
Net earnings	4,041	6,579	19,994	24,528
Chile [Member]
Current assets	120,487		120,487		70,381
Other assets (primarily buildings and equipment)	110,568		110,568		117,779
Current liabilities	55,264		55,264		43,909
Other liabilities (primarily long-term debt)	45,105		45,105		50,132
Net assets	130,686		130,686		94,119
Total revenues	13,121	14,918	61,450	32,222
Gross profit	2,008	(1,257)	19,863	2,032
Income before income taxes	13,550	16,183	48,015	20,577
Net earnings	$ 10,840	$ 13,432	$ 36,567	$ 17,079