CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Common Stock	Additional Paid-In Capital	Accumulated Surplus (Deficit)	Accumulated Other Comprehensive Income (Loss)	Total
BALANCE at Dec. 31, 2009	$ 116	$ 161,512	$ (22,606)	$ 2,417	$ 141,439
Components of comprehensive income:
Net income			11,707		11,707
Foreign currency translation adjustments				(2,351)	(2,351)
Total comprehensive income			11,707	(2,351)	9,356
Issuance of common stock to non-employee directors (4,737 in 2012, 6,840 in 2011 and 7,835 in 2010)		93			93
Exercise of stock options (153,775 in 2012, 468,204 in 2011 and 74,125 in 2010)	1	443			444
Stock-based compensation expense		399			399
Dividends paid, $0.52 per share in 2012, $0.48 per share in 2011 and $0.10 per share in 2010			(1,163)		(1,163)
BALANCE at Dec. 31, 2010	117	162,447	(12,062)	66	150,568
Components of comprehensive income:
Net income			23,008		23,008
Foreign currency translation adjustments				71	71
Total comprehensive income			23,008	71	23,079
Issuance of common stock to non-employee directors (4,737 in 2012, 6,840 in 2011 and 7,835 in 2010)		100			100
Exercise of stock options (153,775 in 2012, 468,204 in 2011 and 74,125 in 2010)	5	2,762			2,767
Repurchase of common stock (1,184,200)	(12)	(19,988)			(20,000)
Stock-based compensation expense		399			399
Excess tax effect for stock-based compensation		1,284			1,284
Dividends paid, $0.52 per share in 2012, $0.48 per share in 2011 and $0.10 per share in 2010			(5,546)		(5,546)
BALANCE at Dec. 31, 2011	110	147,004	5,400	137	152,651
Components of comprehensive income:
Net income			9,122		9,122
Foreign currency translation adjustments				(207)	(207)
Total comprehensive income			9,122	(207)	8,915
Issuance of common stock to non-employee directors (4,737 in 2012, 6,840 in 2011 and 7,835 in 2010)		75			75
Exercise of stock options (153,775 in 2012, 468,204 in 2011 and 74,125 in 2010)	2	851			853
Stock-based compensation expense		332			332
Excess tax effect for stock-based compensation		426			426
Dividends paid, $0.52 per share in 2012, $0.48 per share in 2011 and $0.10 per share in 2010			(5,762)		(5,762)
BALANCE at Dec. 31, 2012	$ 112	$ 148,688	$ 8,760	$ (70)	$ 157,490