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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Cash flows from operating activities:    
Net income $ 8,951 $ 7,607
Depreciation and amortization 2,747 2,790
Deferred income taxes 62 (77)
Other, net 252 348
Change in assets and liabilities:    
Accounts receivable, net (1,386) (4,289)
Inventories, net (475) 280
Accounts payable and accrued liabilities (599) 438
Accounts with affiliates (584) 817
Prepaids and other, net (40) 17
Net cash provided by operating activities 8,928 7,931
Cash flows from investing activities:    
Capital expenditures (2,127) (2,344)
Note receivable from affiliate:    
Collections 40,400 4,400
Advances (49,700) (15,100)
Net cash used in investing activities (11,427) (13,044)
Cash flows from financing activities -    
Dividends paid (1,864) (1,863)
Cash and cash equivalents - net change from:    
Operating, investing and financing activities (4,363) (6,976)
Balance at beginning of period 33,153 52,347
Balance at end of period 28,790 45,371
Supplemental disclosures -    
Cash paid for income taxes $ 5,431 $ 3,355