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 $)
Mar. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Cash and cash equivalents, Carrying Amount $ 25,032,000
Notes receivable from other business ventures (included in other receivables and other assets) 872,000
Long-term debt, including current portion, Carrying Amount 279,094,000
Level 1 [Member]
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Cash and cash equivalents, Estimated Fair Value 25,032,000
Notes receivable from other business ventures (included in other receivables and other assets) 872,000
Long-term debt, including current portion, Estimated Fair Value 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
Notes receivable from other business ventures (included in other receivables and other assets) 0
Long-term debt, including current portion, Estimated Fair Value 292,840,000
Level 3 [Member]
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Cash and cash equivalents, Estimated Fair Value 0
Notes receivable from other business ventures (included in other receivables and other assets) 0
Long-term debt, including current portion, Estimated Fair Value $ 0