CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member]	Total
Balances at Dec. 31, 2018	$ 103,865	$ 2	$ 132,666	$ (6,513)	$ 471,112	$ 701,132
Balances, Shares at Dec. 31, 2018	4,155,000	18,764,000
Net (loss) income					18,574	18,574
Preferred stock dividends, $0.53125/share					(2,207)	(2,207)
Foreign currency translation adjustment				(81)		(81)
Repurchase of common stock			(13,946)			(13,946)
Repurchase of common stock, Shares		(595,000)
Exercise of stock options			107			107
Exercise of stock options, Shares		27,000
Stock-based compensation, net of taxes			730			730
Stock-based compensation, net of taxes, Shares		12,000
Balances at Mar. 31, 2019	$ 103,865	$ 2	119,557	(6,594)	487,479	704,309
Balances, Shares at Mar. 31, 2019	4,155,000	18,208,000
Balances at Dec. 31, 2019	$ 103,865	$ 2	102,709	(6,630)	493,294	693,240
Balances, Shares at Dec. 31, 2019	4,155,000	17,479,000
Net (loss) income					(1,330)	(1,330)
Preferred stock dividends, $0.53125/share					(2,207)	(2,207)
Foreign currency translation adjustment				(137)		$ (137)
Repurchase of common stock, Shares						0
Exercise of stock options			113			$ 113
Exercise of stock options, Shares		8,000
Stock-based compensation, net of taxes			468			468
Stock-based compensation, net of taxes, Shares		19,000
Balances at Mar. 31, 2020	$ 103,865	$ 2	$ 103,290	$ (6,767)	$ 489,757	$ 690,147
Balances, Shares at Mar. 31, 2020	4,155,000	17,506,000