Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 341,638		$ 338,920
Marketable securities	586,882		431,516
Accounts receivable, less allowance for doubtful accounts of $2,912 and $4,118 in 2013 and 2012, respectively	157,642		153,423
Inventories:
Parts	84,232		89,598
Assemblies in process	15,539		32,303
Finished goods	38,168		17,509
Inventory, Net, Total	137,939		139,410
Deferred tax assets	72,478		77,305
Prepayments	136,374		90,931
Other current assets	7,324		4,556
Total current assets	1,440,277		1,236,061
Net property, plant and equipment	275,236		265,782
Marketable securities	271,078		235,872
Deferred tax assets	5,217		5,372
Other assets	14,591		14,837
Retirement plans assets	9,342		3,282
Intangible assets, net	252,291		318,867
Goodwill	361,792		349,272
Total assets	2,629,824	[1]	2,429,345	[1]
Current liabilities:
Accounts payable	62,874		58,324
Accrued employees' compensation and withholdings	95,619		86,264
Deferred revenue and customer advances	55,404		81,357
Other accrued liabilities	63,712		57,249
Accrued income taxes	11,360		12,306
Current debt	186,663		2,328
Total current liabilities	475,632		297,828
Long-term deferred revenue and customer advances	13,306		16,227
Retirement plans liabilities	91,517		94,373
Deferred tax liabilities	40,686		50,201
Long-term other accrued liabilities	23,589		21,302
Long-term debt			171,059
Total liabilities	644,730		650,990
Commitments and contingencies (Note K)
SHAREHOLDERS' EQUITY
Common stock, $0.125 par value, 1,000,000 shares authorized, 191,731 and 187,908 shares issued and outstanding at December 31, 2013 and 2012, respectively	23,966		23,488
Additional paid-in capital	1,390,896		1,347,762
Accumulated other comprehensive income	4,000		5,820
Retained earnings	566,232		401,285
Total shareholders' equity	1,985,094		1,778,355
Total liabilities and shareholders' equity	$ 2,629,824		$ 2,429,345

[1] Total business assets are directly attributable to each business. Corporate assets consist of cash and cash equivalents, marketable securities and certain other assets.