Other Income and Other Expense (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Other income:
Interest income	$ 107	$ 543	$ 712	$ 935
Investment gains - net		12		1,307
Miscellaneous	70	2	225	5
Total other income	177	557	937	2,247
Other expense:
Non-operating costs	(2,389)	(1,629)	(4,239)	(3,119)
Investment losses - net	(58)		(112)
Miscellaneous	(222)	(1,557)	(2,386)	(1,808)
Total other expense	$ (2,669)	$ (3,186)	$ (6,737)	$ (4,927)