Other Non-Operating Income (Expense) (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other Nonoperating Income (Expense) [Abstract]
Foreign currency (losses) gains, net									$ (13,382,000)	$ 3,132,000	$ (3,263,000)
Impairment write-down on a marketable equity security									(10,438,000)	(17,998,000)	(53,793,000)
(Losses) gains on sales or write-downs of cost method investments, net									(1,761,000)	6,639,000	419,000
Other, net									1,830,000	2,771,000	1,437,000
Total Other Non-Operating (Expense) Income	(14,920,000)	8,110,000	(12,858,000)	(4,083,000)	(17,572,000)	4,163,000	(635,000)	8,588,000	(23,751,000)	(5,456,000)	(55,200,000)
Gain on sales of marketable equity securities									$ 900,000	$ 500,000