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Goodwill and Other Intangible Assets (Tables)
 6 Months Ended
Jun. 30, 2013
Notes to Financial Statements [Abstract]  
Goodwill
The carrying value of goodwill by segment is as follows (in thousands):

 
Industrial Technology
 
Energy Systems & Controls
 
Medical & Scientific Imaging
 
RF Technology
 
Total
 
Balances at December 31, 2012
$
421,755
 
$
404,057
 
$
1,772,402
 
$
1,270,643
 
$
3,868,857
 
Additions
 
-
 
 
-
 
 
679,999
 
 
-
 
 
679,999
 
Other
 
-
 
 
-
 
 
(3,793
)
 
445
 
 
(3,348
)
Currency translation adjustments
 
(4,019
)
 
(2,400
)
 
(11,647
)
 
(5,668
)
 
(23,734
)
Balances at June 30, 2013
$
417,736
 
$
401,657
 
$
2,436,961
 
$
1,265,420
 
$
4,521,774
 
Other Intangible Assets
Other intangible assets are comprised of (in thousands):

 
 
Cost
 
Accumulated
amortization
 
Net book
value
 
Assets subject to amortization:
 
 
 
 
 
 
 
 
 
 
Customer related intangibles
 
$
1,509,339
 
$
(379,535
)
$
1,129,804
 
Unpatented technology
 
 
198,609
 
 
(97,487
)
 
101,122
 
Software
 
 
160,520
 
 
(44,256
)
 
116,264
 
Patents and other protective rights
 
 
40,399
 
 
(20,312
)
 
20,087
 
Trade secrets
 
 
1,500
 
 
(1,500
)
 
-
 
Assets not subject to amortization:
 
 
 
 
 
 
 
 
 
 
Trade names
 
 
331,590
 
 
-
 
 
331,590
 
Balances at December 31, 2012
 
$
2,241,957
 
$
(543,090
)
$
1,698,867
 
 
 
 
 
 
 
 
 
 
 
 
Assets subject to amortization:
 
 
 
 
 
 
 
 
 
 
Customer related intangibles
 
$
1,934,311
 
$
(426,269
)
$
1,508,042
 
Unpatented technology
 
 
210,943
 
 
(109,356
)
 
101,587
 
Software
 
 
160,245
 
 
(51,248
)
 
108,997
 
Patents and other protective rights
 
 
30,150
 
 
(21,420
)
 
8,730
 
Trade secrets
 
 
1,500
 
 
(1,500
)
 
-
 
Assets not subject to amortization:
 
 
 
 
 
 
 
 
 
 
Trade names
 
 
357,321
 
 
-
 
 
357,321
 
Balances at June 30, 2013
 
$
2,694,470
 
$
(609,793
)
$
2,084,677
 

Amortization expense of other intangible assets was $69,773 and $50,336 during the six months ended June 30, 2013 and 2012, respectively.