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Summary of Significant Accounting Policies (Tables)
 6 Months Ended
Jun. 30, 2013
Accounting Policies [Abstract]  
Components of inventories
Inventories consisted of the following:
 
June 30,
2013
 
December 31,
2012
Raw materials and parts
$
92,959

 
$
94,809

Work-in-progress
39,535

 
33,608

Finished goods
70,794

 
70,522

 
$
203,288

 
$
198,939
Components of other intangible assets
Other intangible assets consisted of the following:
 
June 30, 2013
 
December 31, 2012
 
Gross
Amount
 
Accumulated
Amortization
 
Gross
Amount
 
Accumulated
Amortization
Customer relationships
$
96,357

 
$
(23,522
)
 
$
96,575

 
$
(21,928
)
Proven technology and patents
42,210

 
(28,491
)
 
42,960

 
(28,014
)
Tradename (finite life)
4,137

 
(1,469
)
 
3,972

 
(1,345
)
Tradename (indefinite life)
25,038

 
—

 
25,061

 
—

Other
745

 
(509
)
 
745

 
(462
)
 
$
168,487

 
$
(53,991
)
 
$
169,313

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

 
$
16,748

Accruals for warranties
9,467

 
8,094

Foreign currency translation
(185
)
 
(305
)
Payments / utilizations
(9,815
)
 
(8,444
)
Balance at end of period
$
15,762

 
$
16,093