Property, Plant and Equipment (Tables)
 12 Months Ended
Dec. 31, 2016
Property, Plant and Equipment [Abstract]  
Property, plant and equipment
Company's owned property, plant and equipment consists of the following at December 31:
 
2016
 
2015
Land
$
5,412

 
$
4,221

Building and improvements
134,398

 
103,199

Leasehold improvements
10,520

 
8,149

Machinery and equipment
511,461

 
397,632

 
661,791

 
513,201

Accumulated depreciation
(138,372
)
 
(75,119
)
 
523,419

 
438,082

Construction in process
76,055

 
136,502

Total
$
599,474

 
$
574,584