CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011
Cash flows from operating activities:
Net income	$ 10,646		$ 6,251
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	9,247		5,820
Loss on disposal of fixed assets	28		0
Provision for (recovery of) receivable allowance	410		(527)
Share-based compensation expense	6,781		7,254
Income tax benefits from employee stock plans	1,638		3,208
Excess tax benefits from employee stock plans	(2,336)		(3,553)
Provision for excess and obsolete inventories	509		564
Foreign currency remeasurement loss	0		140
Deferred income taxes	(1,084)		(270)
Changes in operating assets and liabilities:
Accounts receivable, net	(7,103)		(3,286)
Inventories	2,924		(7,835)
Prepaid expenses	(3,453)		1,316
Other current assets	921		(953)
Net investment in sales-type leases	(1,493)		917
Other assets	(13)		759
Accounts payable	2,131		1,180
Accrued compensation	802		(669)
Accrued liabilities	(1,719)		308
Deferred service revenue	2,117		3,224
Deferred gross profit	5,377		442
Other long-term liabilities	1,147		339
Net cash provided by operating activities	27,477		14,629
Cash flows from investing activities:
Purchases of short-term investments	0		8,097
Maturities of short-term investments	8,122		8,143
Acquisition of intangible assets and intellectual property	(303)		(136)
Software development for external use	(3,118)		(3,523)
Purchases of property and equipment	(9,560)		(6,808)
Business acquisition, net of cash acquired	(156,312)		0
Net cash (used in) provided by investing activities	(161,171)		(10,421)
Cash flows from financing activities:
Proceeds from issuance of common stock under employee stock purchase and stock option plans	6,777		6,607
Stock repurchases	(12,363)		(10,560)
Excess tax benefits from employee stock plans	2,336		3,553
Net cash used in financing activities	(3,250)		(400)
Effect of exchange rate changes on cash and cash equivalents	0		(140)
Net (decrease) increase in cash and cash equivalents	(136,944)		3,668
Cash and cash equivalents at beginning of period	191,762	[1]	175,635
Cash and cash equivalents at end of period	54,818		179,303
Supplemental disclosure of non-cash operating activity:
Acquistiion consideration accrued but not paid	(1,482)		0
Satisfaction of acquired legal contingency with indemnification asset	$ 0		$ (1,200)

[1] Information derived from our December 31, 2011 audited Consolidated Financial Statements.