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Note 2 - Supplemental Cash Flow Disclosure
 12 Months Ended
Dec. 31, 2016
Notes to Financial Statements  
Cash Flow, Supplemental Disclosures [Text Block]
2.
           Supplemental Cash Flow Disclosure
 
The table below sets forth supplemental disclosures of cash flow information and non-cash investing and financing activities.
 
   
Year Ended December 31,
 
 
  
2016
    
2015
    
2014
  
Cash paid for:
  
(Dollars in thousands)
  
Interest, net of interest capitalized
 
$
717
 
 
$
286
 
 
$
1,843
 
Income taxes
 
$
29,144
 
 
$
3,023
 
 
$
2,793
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Non-cash investing and financing activities:
 
 
 
 
 
 
 
 
 
 
 
 
Unrealized holding gains (losses) on marketable securities, net of tax
 
$
6,356
 
 
$
5,260
 
 
$
(1,120
)