Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income(loss)
Balance at Dec. 31, 2017	$ (34,635)	$ 0	$ 12,075	$ 457,186	$ 794,583	$ (1,254,176)	$ (44,303)
Increase (Decrease) in Stockholders' Equity
Preferred stock issued		9,723
Exercise of stock options and release of unvested shares	(115)		78	(159)		(34)
Rounding from reverse stock split	0		(38)	38
Stock-based compensation	(438)			(438)
Treasury stock issued	63			(2,759)		2,822
Net income (loss)	17,550				17,550
Other comprehensive loss	(2,180)						(2,180)
Balance at Dec. 31, 2018	(19,184)	9,723	12,115	453,868	812,704	(1,251,388)	(46,483)
Increase (Decrease) in Stockholders' Equity
Exercise of stock options and release of unvested shares	(6)		6	(12)
Stock-based compensation	1,030			1,030
Treasury stock issued	15			(7,864)		7,879
Net income (loss)	(26,264)				(26,264)
Other comprehensive loss	(16,651)
Other comprehensive loss	(5,296)						(5,296)
Balance at Dec. 31, 2019	$ (49,683)	$ 9,723	$ 12,121	$ 447,022	$ 797,817	$ (1,243,509)	$ (63,134)