CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities:
Net loss	$ (12,977)	$ (4,783)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	7,574	7,892
(Recovery from) provision for doubtful accounts	(77)	144
Non-cash provision for restructuring	0	125
Gain on disposal of fixed assets	(2)	(5)
Compensation expense from stock grants and options	3,133	4,133
Non-cash interest expense	73	80
Unrealized foreign currency transaction losses	2,298	3,785
Changes in deferred tax assets and liabilities, excluding initial effects of acquisitions	372	0
Changes in operating assets and liabilities, excluding initial effects of acquisitions:
Accounts receivable	16,857	5,280
Inventories	7,731	(16,876)
Prepaid expenses and other current assets	(975)	(1,699)
Accounts payable	(5,376)	107
Accrued expenses, compensation and benefits and other liabilities	(12,338)	(15,242)
Income taxes payable	(766)	(541)
Deferred revenues	13,431	11,544
Net cash provided by (used in) operating activities	18,958	(6,056)
Cash flows from investing activities:
Purchases of property and equipment, net	(3,588)	(3,545)
Decrease (increase) in other long-term assets	1,318	(617)
Net cash used in investing activities	(2,270)	(4,162)
Cash flows from financing activities:
(Payments for) proceeds from the issuance of common stock under employee stock plans, net	(172)	127
Proceeds from revolving credit facilities	1,000	8,000
Payments on revolving credit facilities	(1,000)	(8,000)
Net cash (used in) provided by financing activities	(172)	127
Effect of exchange rate changes on cash and cash equivalents	310	529
Net increase (decrease) in cash and cash equivalents	16,826	(9,562)
Cash and cash equivalents at beginning of period	32,855	42,782
Cash and cash equivalents at end of period	49,681	33,220
Cash paid for income taxes, net of refunds	$ 785	$ 2,021