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Summary of Significant Accounting Policies (Tables)
 9 Months Ended
Sep. 30, 2013
Accounting Policies [Abstract]  
Components of inventories
Inventories consisted of the following:
 
September 30,
2013
 
December 31,
2012
Raw materials and parts
$
97,854

 
$
94,450

Work-in-progress
43,538

 
36,899

Finished goods
77,786

 
67,590

 
$
219,178

 
$
198,939
Components of other intangible assets
Other intangible assets consisted of the following:
 
September 30, 2013
 
December 31, 2012
 
Gross
Amount
 
Accumulated
Amortization
 
Gross
Amount
 
Accumulated
Amortization
Customer relationships
$
96,874

 
$
(24,371
)
 
$
96,575

 
$
(21,928
)
Proven technology and patents
42,817

 
(29,178
)
 
42,960

 
(28,014
)
Tradename (finite life)
4,205

 
(1,520
)
 
3,972

 
(1,345
)
Tradename (indefinite life)
25,089

 
—

 
25,061

 
—

Other
753

 
(657
)
 
745

 
(462
)
 
$
169,738

 
$
(55,726
)
 
$
169,313

 
$
(51,749
)
Changes to the Company's accrual for product warranties
Changes to the Company’s accrual for product warranties for the nine months ended September 30 are as follows:
 
September 30,
2013
 
September 30,
2012
Balance at beginning of period
$
16,295

 
$
16,748

Accruals for warranties
14,246

 
12,918

Foreign currency translation
20

 
48

Payments / utilizations
(14,354
)
 
(13,585
)
Balance at end of period
$
16,207

 
$
16,129