CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Treasury Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total
Balance at Dec. 31, 2019	$ 6,017	$ (73,441)	$ 26,690	$ 326,073	$ 74	$ 285,413
Increase (decrease) in shareholders' equity
Net Income (Loss)				(12,262)		(12,262)
Stock Repurchase		(3,915)				(3,915)
Equity Component of Convertible Debt			5,248			5,248
Vested Restricted Stock and Performance Shares	24		(562)			(538)
Exercise of Stock Options and Stock Issuance	4		237			241
Stock Compensation Expense from Restricted Stock Grants and Equity Classified Stock Options			578			578
Cash Dividends				(1,184)		(1,184)
Other Comprehensive Loss, Net of Income Tax					(1,373)	(1,373)
Balance at Mar. 31, 2020	6,045	(77,356)	32,191	312,627	(1,299)	272,208
Balance at Dec. 31, 2019	6,017	(73,441)	26,690	326,073	74	285,413
Balance at Dec. 31, 2020	7,250	(77,541)	83,183	339,917	(1,910)	350,899
Increase (decrease) in shareholders' equity
Net Income (Loss)				7,785		7,785
Vested Restricted Stock and Performance Shares			(436)			(436)
Exercise of Stock Options and Stock Issuance			292			292
Stock Compensation Expense from Restricted Stock Grants and Equity Classified Stock Options			669			669
Par Value $0.01 per Share and Treasury Stock Derecognized	(7,190)	$ 77,541	(70,351)
Equity Issuance Costs			(16)			(16)
Cash Dividends				(6,057)		(6,057)
Other Comprehensive Loss, Net of Income Tax					1,237	1,237
Balance at Mar. 31, 2021	$ 60		$ 13,341	$ 341,645	$ (673)	$ 354,373