Quarterly Financial Information (Summary Of Quarterly Financial Information) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	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
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 951,625		$ 1,004,165		$ 939,047		$ 864,647		$ 801,041		$ 821,175		$ 913,958		$ 1,034,867		$ 3,759,484	[1]	$ 3,571,041	[1]	$ 3,619,848	[1]
Gross profit	295,671		304,471		273,487		227,809		190,248		172,179		201,896		172,637		1,101,438		736,960		559,006
Income (loss) from operations	257,580		266,602		235,227		194,055		156,231		142,517		170,978		145,625		953,464		615,351		446,796
Net income	$ 170,972		$ 170,290		$ 145,816		$ 123,347		$ 95,277		$ 86,964		$ 115,501		$ 87,813		$ 610,425		$ 385,555		$ 258,966
Basic earnings per common share	$ 2.56	[2]	$ 2.55	[2]	$ 2.18	[2]	$ 1.84	[2]	$ 1.43	[2]	$ 1.30	[2]	$ 1.73	[2]	$ 1.32	[2]	$ 9.13		$ 5.78		$ 3.89
Diluted earnings per common share	$ 2.54	[2]	$ 2.54	[2]	$ 2.17	[2]	$ 1.84	[2]	$ 1.42	[2]	$ 1.30	[2]	$ 1.72	[2]	$ 1.31	[2]	$ 9.09		$ 5.75		$ 3.87

[1] Revenues are attributed to countries based on location of customer.

[2] Basic and diluted earnings per common share ("EPS") for each quarter is computed using the weighted average shares outstanding during that quarter, while EPS for the year is computed using the weighted average shares outstanding for the year. As a result, the sum of the EPS for each of the four quarters may not equal the EPS for the year.