CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ 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, 2019	$ 103,865	$ 2	$ 102,709	$ (6,630)	$ 493,294	$ 693,240
Balances, Shares at Dec. 31, 2019	4,155	17,479
Net income (loss)					(1,330)	(1,330)
Preferred stock dividends, $0.53125/share					(2,207)	(2,207)
Foreign currency translation adjustment				(137)		(137)
Exercise of stock options			113			113
Exercise of stock options, Shares		8
Stock-based compensation, net of taxes			468			468
Stock-based compensation, net of taxes, Shares		19
Balances at Mar. 31, 2020	$ 103,865	$ 2	103,290	(6,767)	489,757	690,147
Balances, Shares at Mar. 31, 2020	4,155	17,506
Balances at Dec. 31, 2020	$ 103,865	$ 2	100,795	(5,743)	503,321	702,240
Balances, Shares at Dec. 31, 2020	4,155	17,563
Net income (loss)					35,740	35,740
Common stock dividend declared, $0.30/share					(5,192)	(5,192)
Preferred stock dividends, $0.53125/share					(2,207)	(2,207)
Change in fair value of derivative instruments designated as cash flow hedges				9,509		9,509
Reclassification of realized loss on derivative instruments designated as cash flow hedges				157		157
Foreign currency translation adjustment				(522)		(522)
Income tax expense related to items of other comprehensive income				(2,031)		(2,031)
Repurchase of common stock		$ (390)	(12,788)			$ (12,788)
Repurchase of common stock, Shares						(400)
Exercise of stock options			1,499			$ 1,499
Exercise of stock options, Shares		107
Stock-based compensation, net of taxes			(198)			(198)
Stock-based compensation, net of taxes, Shares		24
Balances at Mar. 31, 2021	$ 103,865	$ 2	$ 89,308	$ 1,370	$ 531,662	$ 726,207
Balances, Shares at Mar. 31, 2021	4,155	17,304