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CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net earnings $ 3,418 $ 3,710
Adjustments to reconcile net earnings to net cash provided by operating activities -    
Depreciation 1,995 1,835
Amortization 186 194
Bad debt expense 291 45
Deferred income taxes 1,434 772
Net foreign currency transaction gains (15) (148)
Stock-based compensation 779 727
Pension contribution (4,000) (2,400)
Pension expense 497 1,667
Increase in cash surrender value of life insurance (115) (115)
Changes in operating assets and liabilities -    
Accounts receivable 13,179 14,616
Inventories 9,041 20,558
Prepaid expenses and other assets 2,831 1,519
Accounts payable (6,927) (8,827)
Accrued liabilities and other 216 (2,329)
Accrued income taxes (2,092) (2,755)
Net cash provided by operating activities 20,718 29,069
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchases of marketable securities (7,433) (2,245)
Proceeds from maturities of marketable securities 3,015 2,670
Life insurance premiums paid (155) (155)
Purchases of property, plant and equipment (772) (3,475)
Net cash used for investing activities (5,345) (3,205)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Cash dividends paid (6,643) (6,483)
Cash dividends paid to noncontrolling interest of subsidiary (204) 0
Shares purchased and retired (6,843) (6,106)
Proceeds from stock options exercised 438 453
Payment of contingent consideration 0 (5,217)
Proceeds from bank borrowings 6,816 58,993
Repayments of bank borrowings (11,084) (70,401)
Income tax benefits from stock-based compensation 25 0
Net cash used for financing activities (17,495) (28,761)
Effect of exchange rate changes on cash and cash equivalents 266 274
Net decrease in cash and cash equivalents (1,856) (2,623)
CASH AND CASH EQUIVALENTS at beginning of period 13,710 17,926
CASH AND CASH EQUIVALENTS at end of period 11,854 15,303
SUPPLEMENTAL CASH FLOW INFORMATION:    
Income taxes paid, net of refunds 2,805 3,989
Interest paid $ 7 $ 158