TRADE ACCOUNTS RECEIVABLE, NET OF ALLOWANCES (Tables)

9 Months Ended

Sep. 30, 2012

Schedule Of Unbilled Trade Accounts Receivable

(in thousands)	September 30,     2012		December 31,     2011
Trade accounts receivable	$	63,370	$	77,123
Unbilled trade accounts receivable		18,753		22,096
Total accounts receivable		82,123		99,219
Allowance for doubtful accounts		—		(31)
Allowance for sales credit memos		(1,274)		(895)
Total allowance		(1,274)		(926)
	$	80,849	$	98,293