CONSOLIDATED STATEMENTS OF SHAREHOLDERS EQUITY - USD ($) $ in Thousands	Common Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock	Additional Paid-In Capital Cumulative Effect, Period of Adoption, Adjusted Balance	Additional Paid-In Capital	Accumulated Surplus Cumulative Effect, Period of Adoption, Adjustment	Accumulated Surplus Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Surplus	Accumulated Other Comprehensive Income (Loss) Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive Income (Loss)	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	Total
BALANCE at Dec. 31, 2018	$ 114	$ 114	$ 150,905	$ 150,905	$ 4	$ 81,358	$ 81,354	$ (4,810)	$ (4,810)	$ 4	$ 227,567	$ 227,563
Components of comprehensive income:
Net income							39,111					39,111
Foreign currency translation adjustments									(693)			(693)
COMPREHENSIVE INCOME							39,111		(693)			38,418
Issuance of common stock to non-employee directors				150								150
Dividends paid							(8,208)					(8,208)
BALANCE at Dec. 31, 2019		114		151,055			112,261		(5,503)			257,927
Components of comprehensive income:
Net income							29,830					29,830
Foreign currency translation adjustments									2,714			2,714
COMPREHENSIVE INCOME							29,830		2,714			32,544
Issuance of common stock to non-employee directors				194								194
Dividends paid							(8,212)					(8,212)
BALANCE at Dec. 31, 2020		114		151,249			133,879		(2,789)			282,453
Components of comprehensive income:
Net income							16,255					16,255
Foreign currency translation adjustments									(2,156)			(2,156)
COMPREHENSIVE INCOME							16,255		(2,156)			14,099
Issuance of common stock to non-employee directors				200								200
Dividends paid							(8,216)					(8,216)
BALANCE at Dec. 31, 2021		$ 114		$ 151,449			$ 141,918		$ (4,945)			$ 288,536