Operations And Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Operations And Summary Of Significant Accounting Policies [Abstract]

Schedule of Deferred Revenue

(In thousands)		December 31, 2011
Deferred revenue, as previously reported	$	90,074
Balances as reported in this Form 10-K:
Deferred revenue - current		80,059
Deferred revenue - long-term		10,015

Schedule Of Allowance For Doubtful Accounts And Sales Returns

(In thousands)
Year		Description		Balance at Beginning of Period		Provisions/ (Recapture)		Write-Offs/ (Recapture)		Balance at End of Period
2010	Allowance for doubtful accounts and sales returns		$	4,619	$	(578)	$	273	$	3,768
2011	Allowance for doubtful accounts and sales returns		$	3,768	$	385	$	(88)	$	4,241
2012	Allowance for doubtful accounts and sales returns		$	4,241	$	1,216	$	587	$	4,870

Adjustment For Excess And Obsolete Inventories

(In thousands)
Year		Description		Balance at Beginning of Period		Provisions		Write-Offs		Balance at End of Period
2010	Adjustment for excess and obsolete inventories		$	4,390	$	1,785	$	2,835	$	3,340
2011	Adjustment for excess and obsolete inventories		$	3,340	$	3,554	$	2,689	$	4,205
2012	Adjustment for excess and obsolete inventories		$	4,205	$	1,824	$	2,185	$	3,844

Schedule Of Warranty Reserve

(In thousands)
		2012		2011		2010
Balance at the beginning of the period	$	1,271	$	921	$	921
Accruals for warranties issued during the period		2,270		2,954		1,993
Settlements made (in cash or in kind) during the period		(2,106)		(2,604)		(1,993)
Balance at the end of the period	$	1,435	$	1,271	$	921

Reconciliation Of The Denominators Used To Calculate Basic And Diluted EPS

	Years ended December 31,
(In thousands)	2012	2011	2010
Weighted average shares outstanding-basic	121,973	119,836	116,973
Plus: Common share equivalents
Stock options, restricted stock units	1,004	1,384	1,599
Weighted average shares outstanding-diluted	122,977	121,220	118,572