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Supplemental Cash Flows
 12 Months Ended
Dec. 31, 2013
Supplemental Cash Flows  
Supplemental Cash Flows

13. Supplemental Cash Flows

        Supplemental disclosures of cash flow information are as follows for the years ended December 31:

(in thousands)
   2013   2012   2011  

Cash paid during the period for:

                    

Income taxes

   $ 18,115   $ 16,926   $ 9,151  

Interest expense

     571     670     524  

Noncash investing activities:

                    

Acquisition of property and equipment for which payment is pending

     804     390     901