Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 573,736	$ 397,737
Marketable securities	96,502	409,061
Accounts receivable, less allowance for doubtful accounts of $4,102 and $3,752 in 2011 and 2010, respectively	129,330	168,756
Inventories:
Parts	109,315	78,109
Assemblies in process	33,856	16,013
Finished goods	16,892	22,719
Inventories, total	160,063	116,841
Deferred tax assets	53,948	22,730
Prepayments and other current assets	86,308	52,780
Current assets from discontinued operations		8,713
Total current assets	1,099,887	1,176,618
Property, plant and equipment:
Land	16,561	16,561
Buildings and improvements	131,743	130,091
Machinery and equipment	648,610	625,649
Construction in progress	1,280	1,073
Total property, plant and equipment	798,194	773,374
Less: Accumulated depreciation	565,987	542,266
Net property, plant and equipment	232,207	231,108
Marketable securities	84,407	248,696
Retirement plans assets	8,840	13,981
Intangible assets, net	392,975	122,941
Goodwill	352,778
Other assets	17,545	16,542
Long-term assets from discontinued operations		469
Total assets	2,188,639	1,810,355
Current liabilities:
Accounts payable	69,842	81,142
Accrued employees' compensation and withholdings	90,427	105,374
Deferred revenue and customer advances	78,670	105,568
Contingent consideration	68,892
Other accrued liabilities	62,420	57,145
Accrued income taxes	860	8,465
Current debt	2,573	2,450
Current liabilities from discontinued operations		3,560
Total current liabilities	373,684	363,704
Long-term deferred revenue and customer advances	33,541	71,558
Retirement plans liabilities	76,638	72,071
Deferred tax liabilities	16,049	9,849
Long-term other accrued liabilities	23,711	19,448
Long-term debt	159,956	150,182
Long-term liabilities of discontinued operations		1,355
Total liabilities	683,579	688,167
Commitments and contingencies (Note J)
SHAREHOLDERS' EQUITY
Common stock, $0.125 par value, 1,000,000 shares authorized, 183,587 and 182,035 shares issued and outstanding at December 31, 2011 and 2010, respectively	22,948	22,755
Additional paid-in capital	1,293,130	1,269,525
Accumulated other comprehensive loss	(129,875)	(128,216)
Retained earnings (accumulated deficit)	318,857	(41,876)
Total shareholders' equity	1,505,060	1,122,188
Total liabilities and shareholders' equity	$ 2,188,639	$ 1,810,355