Long-Term Debt And Notes Payable (Components Of Debt) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Debt Instrument [Line Items]
Total Long-term debt	$ 399,092		$ 398,914
Short-term borrowings	1,123		1,112
5.50% Notes Due 2013 [Member]
Debt Instrument [Line Items]
Total Long-term debt	199,898	[1]	199,753	[1]
6.55% Notes Due 2036 [Member]
Debt Instrument [Line Items]
Total Long-term debt	$ 199,194		$ 199,161

[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.