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Supplemental Cash Flows (Tables)

12 Months Ended

Dec. 31, 2012

Supplemental Cash Flows

Schedule of supplemental disclosures of cash flow information

(in thousands)		2012			2011			2010
Cash paid during the period for:
Income taxes		$	16,926		$	9,151		$	6,358
Interest expense			670			524			968
Noncash investing activities:
Acquisition of property and equipment for which payment is pending			390			901			3,349
Acquisition of property and equipment through like-kind exchange of similar assets			—			—			2,924

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