Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]
Common Stock, Shares, Outstanding	8,888,028
Common Stock Outstanding, $1 Par Value	$ 8,921
Capital in Excess of Par Value	13,005
Retained Earnings	71,453
Treasury Stock	(711)
Accumulated Other Comprehensive Income (Loss)	822
Total Stockholders' Equity	93,490
Net income	1,236
Adjustment for foreign currency translation	(1,483)
Stock-based compensation	$ 651
Shares Issued	307
Shares Issued, Par Value		$ 1	$ (1)
Net income	$ 4,430
Adjustment for foreign currency translation	$ (1,461)
Common Stock, Shares, Outstanding	8,888,335
Common Stock Outstanding, $1 Par Value	$ 8,922
Capital in Excess of Par Value	13,655
Retained Earnings	72,360
Treasury Stock	(711)
Accumulated Other Comprehensive Income (Loss)	(661)
Total Stockholders' Equity	93,565
Change in accounting principle	(329)
Net income	3,194
Adjustment for foreign currency translation	22
Stock-based compensation	$ 673
Shares Issued	30,304
Shares Issued, Par Value		30	(30)
Common Stock, Shares, Outstanding	8,918,639
Common Stock Outstanding, $1 Par Value	$ 8,952
Capital in Excess of Par Value	14,298
Retained Earnings	75,554
Treasury Stock	(711)
Accumulated Other Comprehensive Income (Loss)	(639)
Total Stockholders' Equity	$ 97,454
Common Stock, Shares, Outstanding	8,955,930
Common Stock Outstanding, $1 Par Value	$ 9,006
Capital in Excess of Par Value	15,623
Retained Earnings	77,338
Treasury Stock	(1,234)
Accumulated Other Comprehensive Income (Loss)	(1,560)
Total Stockholders' Equity	99,173
Net income	4,146
Adjustment for foreign currency translation	675
Stock-based compensation	$ 666
Shares issued, Par Value	6,520
Shares Issued, Par Value	$ 0	6	(6)
Net income	5,453
Adjustment for foreign currency translation	$ 1,392
Common Stock, Shares, Outstanding	8,962,450
Common Stock Outstanding, $1 Par Value	$ 9,012
Capital in Excess of Par Value	16,283
Retained Earnings	83,421
Treasury Stock	(1,234)
Accumulated Other Comprehensive Income (Loss)	(885)
Total Stockholders' Equity	106,597
Change in accounting principle	1,937
Net income	1,307
Adjustment for foreign currency translation	717
Stock-based compensation	$ 711
Shares issued, Par Value	20,712
Shares Issued, Par Value	$ 0	$ 21	$ (21)
Common Stock, Shares, Outstanding	8,983,162
Common Stock Outstanding, $1 Par Value	$ 9,033
Capital in Excess of Par Value	16,973
Retained Earnings	84,728
Treasury Stock	(1,234)
Accumulated Other Comprehensive Income (Loss)	(168)
Total Stockholders' Equity	$ 109,332