Segment Information (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
General corporate expenses and other business operations, net
Gross profit-Other	$ 33,187	$ 34,257	$ 143,366	$ 160,197
Selling, general and administrative:
Total selling, general and administrative	(21,711)	(21,635)	(65,988)	(64,737)
Other income	489	58	837	2,035
Other expense	(384)	(149)	(1,106)	(2,532)
Total general corporate expenses and other business operations, net	11,889	12,492	77,294	94,803
Other [Member]
General corporate expenses and other business operations, net
Gross profit-Other	1,439	772	3,685	2,719
Selling, general and administrative:
Personnel costs	(2,299)	(2,187)	(7,829)	(6,338)
Professional fees	(881)	(957)	(3,250)	(3,046)
All other	(857)	(909)	(2,639)	(3,420)
Total selling, general and administrative	(4,037)	(4,053)	(13,718)	(12,804)
Other income	107	26	302	102
Other expense	(5)	(96)	(5)	(494)
Total general corporate expenses and other business operations, net	$ (2,496)	$ (3,351)	$ (9,736)	$ (10,477)