CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 87,334	$ 62,313
Accounts receivable, net of allowances of $838 and $772 at March 31, 2013 and December 31, 2012, respectively	63,840	55,116
Inventories	26,360	26,903
Prepaid expenses	15,928	15,392
Deferred tax assets	11,860	11,860
Other current assets	7,899	9,172
Total current assets	213,221	180,756
Property and equipment, net	34,114	34,107
Non-current net investment in sales-type leases	13,222	13,228
Goodwill	111,343	111,407
Other intangible assets	83,468	85,550
Non-current deferred tax assets	985	993
Other assets	15,775	15,778
Total assets	472,128	441,819
Current liabilities:
Accounts payable	17,459	18,255
Accrued compensation	11,239	11,613
Accrued liabilities	14,053	11,988
Deferred service revenue	20,434	20,449
Deferred gross profit	25,350	20,772
Total current liabilities	88,535	83,077
Non-current deferred service revenue	18,598	19,892
Non-current deferred tax liabilities	26,225	26,491
Other long-term liabilities	5,039	4,809
Total liabilities	138,397	134,269
Stockholders' equity:
Total stockholders' equity	333,731	307,550
Total liabilities and stockholders' equity	$ 472,128	$ 441,819