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Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2012
Fair Value Measurements [Abstract]  
Fair value measurement of assets and liabilities on a recurring basis
                         
in thousands   Level 1  
 

June 30

2012

   

December 31

2011

   

June 30

2011

 

Fair Value Recurring

                       

Rabbi Trust
Mutual funds

        $14,404       $13,536       $14,836  

Equities

    7,726       7,057       8,413  

Total

    $22,130       $20,593       $23,249  
       

    

                       
in thousands   Level 2  
  June 30
2012
    December 31
2011
    June 30
2011
 

Fair Value Recurring

                       

Interest rate swaps

    $0       $0       ($7,419

Rabbi Trust
Common/collective trust funds

    384       2,192       1,368  

Total

    $384       $2,192       ($6,051