Supplemental Cash Flow Information (Tables)
 12 Months Ended
Dec. 31, 2016
Supplemental Cash Flow Elements [Abstract]  
Schedule of cash flow, supplemental disclosures SUPPLEMENTAL CASH FLOW INFORMATION
 
Year Ended December 31,
 
2016
 
2015
 
2014
 
 
 
 
 
 
Cash paid during the year for:
(In Thousands)
Income taxes, net of refunds
$
8,791

 
$
707

 
$
60

Interest
9

 
—

 
1

Non-cash financing activity:
 

 
 

 
 

Conversion of preferred stock
—

 
—

 
111

Issuance of treasury stock
1,741

 
666

 
—