Supplemental Balance Sheet, Income Statement and Cash Flow Information (Details 4) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Supplemental Balance Sheet, Income Statement and Cash Flow Information
Losses (gains) on sales, disposals and involuntary conversions of long-lived assets	$ 13,624	$ (147,522)	$ (11,196)
Litigation expenses	11,684	5,382	11,301
Foreign currency transaction losses (gains)	6,219	4,787	5,499
Losses (gains) on derivative instruments		(1,281)	(2,159)
Other losses (gains)	6,450	1,998	1,029
Losses (gains) on sales and retirements of long-lived assets and other expense (income), net	37,977	(136,636)	4,474
Accumulated other comprehensive income (loss)
Balance at the beginning of the period	431,595
Other comprehensive income (loss) before reclassifications	(42,479)
Amount reclassified from accumulated other comprehensive income (loss)	(81,524)
Net other comprehensive income (loss)	(124,003)	110,331	(20,788)
Balance at the end of the period	307,592	431,595
Gains (losses) on cash flow hedges
Accumulated other comprehensive income (loss)
Balance at the beginning of the period	(2,793)
Amount reclassified from accumulated other comprehensive income (loss)	374
Net other comprehensive income (loss)	374
Balance at the end of the period	(2,419)
Unrealized gains (losses) on available-for-sale securities
Accumulated other comprehensive income (loss)
Balance at the beginning of the period	134,229
Other comprehensive income (loss) before reclassifications	22,968
Amount reclassified from accumulated other comprehensive income (loss)	(85,455)
Net other comprehensive income (loss)	(62,487)
Balance at the end of the period	71,742
Defined benefit pension plan items
Accumulated other comprehensive income (loss)
Balance at the beginning of the period	(7,632)
Amount reclassified from accumulated other comprehensive income (loss)	3,557
Net other comprehensive income (loss)	3,557
Balance at the end of the period	(4,075)
Foreign currency items
Accumulated other comprehensive income (loss)
Balance at the beginning of the period	307,791
Other comprehensive income (loss) before reclassifications	(65,447)
Net other comprehensive income (loss)	(65,447)
Balance at the end of the period	$ 242,344