Supplemental Cash Flow Information (Tables)

6 Months Ended

Jun. 30, 2011

Supplemental Cash Flow Information

Schedule of Supplemental Cash Flow Information

	Six Months Ended June 30,
(in thousands)	2011		2010
Supplemental disclosure of non-cash transactions:
Employee share-based compensation	$	7,163	$	5,408
Unrealized gains on available for sale securities, net		48		4
Supplemental disclosure of cash flow information:
Cash paid for income taxes	$	53,274	$	17,432
Cash paid for interest		2,050		2,050
Cash received for stock option exercises		2,858		1,256
Cash received for employee stock purchase plan		248		158