CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 485,692	$ 573,736
Marketable securities	344,850	96,502
Accounts receivable, less allowance for doubtful accounts of $4,149 and $4,102 at September 30, 2012 and December 31, 2011, respectively	205,464	129,330
Inventories:
Raw materials	94,833	102,307
Assemblies in process	25,926	24,283
Finished goods	13,998	33,473
Inventory, Net, Total	134,757	160,063
Deferred tax assets	58,517	53,948
Prepayments and other current assets	81,987	86,308
Total current assets	1,311,267	1,099,887
Property, plant and equipment	847,711	798,194
Less: Accumulated depreciation	586,593	565,987
Net property, plant and equipment	261,118	232,207
Long-term marketable securities	178,281	84,407
Retirement plan assets	7,711	8,840
Intangible assets, net	337,688	392,975
Goodwill	349,373	352,778
Other assets	17,853	17,545
Total assets	2,463,291	2,188,639
Current liabilities:
Accounts payable	74,187	69,842
Accrued employees' compensation and withholdings	78,929	90,427
Deferred revenue and customer advances	70,968	78,670
Contingent consideration	16,513	68,892
Other accrued liabilities	61,220	62,420
Accrued income taxes	43,573	860
Current debt	3,863	2,573
Total current liabilities	349,253	373,684
Long-term deferred revenue and customer advances	30,592	33,541
Retirement plan liabilities	80,504	76,638
Deferred tax liabilities	30,932	16,049
Long-term other accrued liabilities	19,211	23,711
Long-term debt	167,556	159,956
Total liabilities	678,048	683,579
Commitments and contingencies (Note O)
SHAREHOLDERS' EQUITY
Common stock, $0.125 par value, 1,000,000 shares authorized, 187,651 shares and 183,587 shares issued and outstanding at September 30, 2012 and December 31, 2011, respectively	23,456	22,948
Additional paid-in capital	1,337,616	1,293,130
Accumulated other comprehensive income	6,343	4,746
Retained earnings	417,828	184,236
Total shareholders' equity	1,785,243	1,505,060
Total liabilities and shareholders' equity	$ 2,463,291	$ 2,188,639