CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 32,855	$ 42,782
Accounts receivable, net of allowances of $15,985 and $17,149 at December 31, 2011 and 2010, respectively	104,305	101,171
Inventories	111,833	108,357
Deferred tax assets, net	1,480	1,068
Prepaid expenses	7,652	7,688
Other current assets	14,509	15,701
Total current assets	272,634	276,767
Property and equipment, net	53,487	62,519
Intangible assets, net	18,524	29,750
Goodwill	246,398	246,997
Other assets	11,568	10,538
Total assets	602,611	626,571
Current liabilities:
Accounts payable	42,533	47,340
Accrued compensation and benefits	31,350	38,686
Accrued expenses and other current liabilities	34,174	40,986
Income taxes payable	3,898	4,640
Deferred revenues	45,768	43,634
Total current liabilities	157,723	175,286
Long-term liabilities	27,885	24,675
Total liabilities	185,608	199,961
Commitments and contingencies (Notes M and P)
Stockholders' equity:
Preferred stock, $0.01 par value, 1,000 shares authorized; no shares issued or outstanding	0	0
Common stock, $0.01 par value, 100,000 shares authorized; 42,339 shares and 42,339 shares issued and 38,605 and 38,175 outstanding at December 31, 2011 and 2010, respectively	423	423
Additional paid-in capital	1,018,604	1,005,198
Accumulated deficit	(524,530)	(495,254)
Treasury stock at cost, net of reissuances, 3,734 shares and 4,164 shares at December 31, 2011 and 2010, respectively	(82,301)	(91,025)
Accumulated other comprehensive income	4,807	7,268
Total stockholders' equity	417,003	426,610
Total liabilities and stockholders' equity	$ 602,611	$ 626,571