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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
OPERATING ACTIVITIES:    
Net income $ 13,720 $ 15,469
Adjustments to reconcile net income to net cash from operating activities:    
Depreciation and amortization 4,169 3,359
Provision for doubtful accounts (32) 177
Issuance of non-employee director shares 150 96
Deferred income tax provision 14 5
(Gain) Loss on disposal of property, plant and equipment (624) 3
Changes in operating assets and liabilities:    
Accounts receivable (9,318) (17,825)
Inventories 960 1,113
Prepaid expenses 1,815 (1,011)
Other assets 28 (48)
Accounts payable (6,661) (3,531)
Accrued liabilities 4,425 978
Net cash flows from (used in) operating activities 8,646 (1,215)
INVESTING ACTIVITIES:    
Purchases of property, plant and equipment (19,246) (19,155)
Proceeds from sale of plant, property & equipment 1,303 5
Net cash flows from (used in) investing activities (17,943) (19,150)
FINANCING ACTIVITIES:    
Net borrowings under credit facility 15,000 20,000
Payments of cash dividends (6,139) (5,786)
Proceeds from stock option exercises 143  
Net cash flows from (used in) financing activities 9,004 14,214
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND TEMPORARY INVESTMENTS 2,677 542
NET CHANGE IN CASH AND TEMPORARY INVESTMENTS 2,384 (5,609)
CASH AND TEMPORARY INVESTMENTS, beginning of period 31,115 38,449
CASH AND TEMPORARY INVESTMENTS, end of period 33,499 32,840
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:    
Cash payments for interest 1,620 1,314
Cash payments for income taxes, net of refunds $ 2,672 $ 9,211