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Basis of Preparation (Tables)
 9 Months Ended
Sep. 30, 2012
Accounting Policies [Abstract]  
Schedule of Inventory, Current
The components of inventory are as follows:
 
September 30,
2012
 
December 31,
2011
Raw materials and supplies
$
84,686

 
$
64,832

Work in process
46,719

 
36,045

Finished goods
73,374

 
48,945

 
$
204,779

 
$
149,822
Schedule of Product Warranty Liability
The changes in the Company’s consolidated warranty reserve during the three and nine months ended September 30, 2012 and 2011 are as follows (see Note G for further details on the acquired warranty reserves):
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2012
 
2011
 
2012
 
2011
Beginning balance
$
11,248

 
$
12,849

 
$
13,181

 
$
13,372

Warranty expense
2,741

 
1,631

 
6,343

 
5,233

Warranty usage
(3,722
)
 
(1,949
)
 
(9,257
)
 
(6,074
)
Acquired warranty reserves
18,779

 
817

 
18,779

 
817

Ending balance
$
29,046

 
$
13,348

 
$
29,046

 
$
13,348
Schedule Of Finite Lived And Indefinite Lived Intangible Assets
The following table displays the gross carrying amount and accumulated amortization for all intangible assets:
 
 
 
September 30, 2012
 
December 31, 2011
 
Estimated
Useful Life
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Gross
Carrying
Amount
 
Accumulated
Amortization
Finite-lived assets:
 
 
 
 
 
 
 
 
 
Unpatented technology
9 years
 
$
41,461

 
$
(10,305
)
 
$
18,113

 
$
(9,024
)
Patents
10 years
 
8,980

 
(6,914
)
 
9,080

 
(5,434
)
Product names
14 years
 
9,281

 
(2,261
)
 
5,638

 
(1,818
)
Customer relations
13 years
 
165,192

 
(56,018
)
 
130,488

 
(48,840
)
 
 
 
$
224,914

 
$
(75,498
)
 
$
163,319

 
$
(65,116
)
Indefinite-lived intangible assets:
 
 
 
 
 
 
 
 
 
Trademarks and trade names
 
 
$
45,215

 
 
 
$
39,280

 
 
In-process research and development
 
 
—

 
 
 
3,070

 
 
 
 
 
$
45,215

 
 
 
$
42,350

 
 
Schedule of Goodwill
The following table represents the changes in goodwill:
Balance as of January 1, 2012
$
288,770

Foreign currency adjustments
(177
)
Acquisition of AirSep Corporation
98,649

Balance as of September 30, 2012
$
387,242
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
The Company estimates amortization expense to be recognized during the next five years as follows:
For the Year ending December 31,
 
2012
$
15,100

2013
18,900

2014
17,600

2015
15,900

2016
14,100