Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Estimated Fair Value Of Other Financial Assets And Liabilities) (Details)

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Fair Value Measurements (Estimated Fair Value Of Other Financial Assets And Liabilities) (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents, Carrying Amount $ 27,345 $ 11,505
Notes receivable from other business ventures (included in other receivables and other assets) 677 925
Long-term debt, including current portion, Carrying Amount 278,454 279,735
Level 1 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents, Estimated Fair Value 27,345 11,505
Notes receivable from other business ventures (included in other receivables and other assets) 677 925
Long-term debt, including current portion, Estimated Fair Value 0 0
Level 2 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents, Estimated Fair Value 0 0
Notes receivable from other business ventures (included in other receivables and other assets) 0 0
Long-term debt, including current portion, Estimated Fair Value 281,731 283,120
Level 3 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents, Estimated Fair Value 0 0
Notes receivable from other business ventures (included in other receivables and other assets) 0 0
Long-term debt, including current portion, Estimated Fair Value $ 0 $ 0