Unaudited Condensed Consolidated Statements Of Shareholders' Equity (USD $) In Thousands	Total	Common shares	Treasury shares	Retained earnings
Balance, at beginning of period at Dec. 31, 2012	$ 3,326,335	$ 454,980	$ (113,818)	$ 2,985,173
Net income	279,973			279,973
Dividends — par value reduction	(12,981)	(12,981)
Dividends	(34,069)			(34,069)
Stock compensation	7,815		26,093	(18,278)
Share repurchases	(123,145)		(123,145)
Shares cancelled	0	(17,162)	125,025	(107,863)
Balance, at end of period at Sep. 30, 2013	3,443,928	424,837	(85,845)	3,104,936
Balance, at beginning of period at Dec. 31, 2013	3,519,826	418,988	(79,992)	3,180,830
Net income	359,750			359,750
Dividends	(60,017)			(60,017)
Stock compensation	18,568		17,235	1,333
Share repurchases	(164,528)		(164,528)
Shares cancelled	0	(10,998)	92,652	(81,654)
Balance, at end of period at Sep. 30, 2014	$ 3,673,599	$ 407,990	$ (134,633)	$ 3,400,242