CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) (USD $) In Thousands, unless otherwise specified	Total	Class A ordinary shares/ Common stock [Member]	Additional paid-in capital [Member]	Retained earnings [Member]	Treasury shares [Member]	Accumulated other comprehensive income (loss) [Member]
Balance at Dec. 31, 2012	$ 4,531,724	$ 15,593	$ 1,372,135	$ 3,366,964	$ (1,886)	$ (221,082)
Balance (in shares) at Dec. 31, 2012		124,211
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net shares issued (acquired) under share-based compensation plans	(1,718)	4	2,331	0	(4,053)	0
Net shares issued (acquired) under share-based compensation plans (in shares)		26
Share-based compensation	20,918	0	20,918	0	0	0
Excess tax benefit (shortfall) from share-based compensation plans	977	0	977	0	0	0
Retirement benefit adjustments, net of taxes	10,986	0	0	0	0	10,986
Other	1,820	0	1,820	0	0	0
Net income	202,878	0	0	202,878	0	0
Balance at Sep. 30, 2013	4,767,585	15,597	1,398,181	3,569,842	(5,939)	(210,096)
Balance (in shares) at Sep. 30, 2013		124,237
Balance at Dec. 31, 2013	4,893,761	15,597	1,407,031	3,619,540	(5,962)	(142,445)
Balance (in shares) at Dec. 31, 2013		124,237
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net shares issued (acquired) under share-based compensation plans	308	7	1,566	0	(1,265)	0
Net shares issued (acquired) under share-based compensation plans (in shares)		291
Share-based compensation	22,000	0	22,000	0	0	0
Excess tax benefit (shortfall) from share-based compensation plans	15	0	15	0	0	0
Retirement benefit adjustments, net of taxes	7,281	0	0	0	0	7,281
Dividends, Cash	(25,123)	0	0	(25,123)	0	0
Other	(287)	0	0	0	0	(287)
Net income	212,036	0	0	212,036	0	0
Balance at Sep. 30, 2014	$ 5,109,991	$ 15,604	$ 1,430,612	$ 3,806,453	$ (7,227)	$ (135,451)
Balance (in shares) at Sep. 30, 2014		124,528