Long-Term Debt And Notes Payable (Components Of Debt) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Debt Instrument [Line Items]
Total Long-term debt	$ 749,170		$ 399,092
Short-term borrowings	125,826		1,123
5.50% Notes Due 2013 [Member]
Debt Instrument [Line Items]
Total Long-term debt	0	[1]	199,898	[1]
2.75% Notes Due 2018 [Member]
Debt Instrument [Line Items]
Total Long-term debt	249,965
4.45% Notes Due 2023 [Member]
Debt Instrument [Line Items]
Total Long-term debt	299,976
6.55% Notes Due 2036 [Member]
Debt Instrument [Line Items]
Total Long-term debt	$ 199,229		$ 199,194

[1] As of December 31, 2012, the Company classified the notes which mature in 2013 as long-term debt due to the Company's intent to refinance on a long-term basis and the ability to utilize the existing five-year $300 million Amended and Restated Credit Agreement.