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Supplemental Cash Flow Information
 12 Months Ended
Dec. 31, 2018
Supplemental Cash Flow Information [Abstract]  
Supplemental Cash Flow Information
Supplemental Cash Flow Information

Supplemental cash flows and non-cash transactions were as follows for the periods indicated (in thousands):
 
Year Ended December 31,
 
2018
 
2017
 
2016
 
 
 
 
 
 
Cash paid for interest
$
273

 
$
296

 
$
447

Cash paid (received) for income taxes, net of refunds
1,848

 
(20,732
)
 
8,754

 
 
 
 
 
 
Non-cash transactions:
 
 
 
 
 
Change in accruals related to purchases of property, plant and equipment and intangibles
$
5,910

 
$
5,761

 
$
1,658

Insurance premium financed by note payable
6,798

 
5,125

 
—

Net transfers from inventory to property, plant and equipment
4,529

 
4,689

 
—

Value of shares issued for Blackhawk Group acquisition
—

 
—

 
144,047

Conversion of Preferred Stock
—

 
—

 
55,941

TRA liability
—

 
—

 
124,531

Deferred tax impact of TRA
—

 
—

 
68,590