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Other intangible assets, net
9 Months Ended
Sep. 30, 2012
Notes to Financial Statements [Abstract]  
Other intangible assets, net
8.
Other Intangible Assets, net
 
 
 
Cost
 
Accumulated
amortization
 
Net book
value
 
 
 
(in thousands)
 
Assets subject to amortization:
 
 
 
 
 
 
 
 
 
 
Customer related intangibles
 
$
1,022,134
 
$
(302,156
)
$
719,978
 
Unpatented technology
 
 
193,915
 
 
(72,358
)
 
121,557
 
Software
 
 
49,395
 
 
(35,833
)
 
13,562
 
Patents and other protective rights
 
 
25,398
 
 
(17,699
)
 
7,699
 
Trade secrets
 
 
1,500
 
 
(1,361
)
 
139
 
Assets not subject to amortization:
 
 
 
 
 
 
 
 
 
 
Trade names
 
 
231,207
 
 
-
 
 
231,207
 
Balances at December 31, 2011
 
$
1,523,549
 
$
(429,407
)
$
1,094,142
 
 
 
 
 
 
 
 
 
 
 
 
Assets subject to amortization:
 
 
 
 
 
 
 
 
 
 
Customer related intangibles
 
$
1,502,947
 
$
(358,525
)
$
1,144,422
 
Unpatented technology
 
 
199,112
 
 
(89,504
)
 
109,608
 
Software
 
 
160,542
 
 
(40,500
)
 
120,042
 
Patents and other protective rights
 
 
27,679
 
 
(19,661
)
 
8,018
 
Trade secrets
 
 
1,500
 
 
(1,465
)
 
35
 
Assets not subject to amortization:
 
 
 
 
 
 
 
 
 
 
Trade names
 
 
330,561
 
 
-
 
 
330,561
 
Balances at September 30, 2012
 
$
2,222,341
 
$
(509,655
)
$
1,712,686
 


Amortization expense of other intangible assets was $79,335 and $73,466 during the nine months ended September 30, 2012 and 2011, respectively.