Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 304,070	$ 266,302
Short-term investments in marketable securities	93,868	79,532
Short-term restricted cash	13,697	14,522
Receivables, net of allowances for doubtful accounts of $2,561 and $2,718	197,051	211,160
Inventories	187,032	192,540
Deferred tax assets	11,610	12,245
Other current assets	31,021	29,332
Total current assets	838,349	805,633
Non-current investments in marketable securities	18,422	29,179
Long-term restricted cash	34,238	27,425
Property, plant and equipment, net of accumulated depreciation of $121,967 and $121,560	140,002	109,872
Intangible assets, net of accumulated amortization of $15,037 and $10,984	48,136	51,499
Goodwill	129,122	131,320
Deferred tax assets	1,695	5,092
Non-current inventories	63,185	65,116
Other assets, net	8,668	9,087
Total Assets	1,281,817	1,234,223
Current liabilities:
Accounts payable	58,707	54,847
Accrued payroll liabilities	33,595	39,100
Accrued warranty reserves	12,146	12,049
Accrued agent commissions	6,507	8,124
Short-term deferred revenue	81,959	74,736
Income taxes payable	1,131	1,343
Accrued restructuring, reorganization, relocation and severance	1,054	2,692
Convertible debt	0	89,010
Other current liabilities	28,745	36,902
Total current liabilities	223,844	318,803
Long-term deferred revenue	28,260	26,668
Deferred tax liabilities	7,251	17,588
Other liabilities	39,185	31,261
Commitments and contingencies
Shareholders' Equity:
Preferred stock - 500 shares authorized; none issued and outstanding	0	0
Common stock - 70,000 shares authorized; 41,745 and 38,478 shares issued and outstanding, no par value	622,257	516,907
Retained earnings	333,120	284,440
Accumulated other comprehensive income	27,900	38,556
Total Shareholders' Equity	983,277	839,903
Total Liabilities and Shareholders' Equity	$ 1,281,817	$ 1,234,223