Consolidated Statements of Changes in Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Adoption of new accounting standard	Common Stock	Additional paid-in capital	Warrants	Retained earnings (Accumulated deficit)	Retained earnings (Accumulated deficit) Adoption of new accounting standard	Accumulated other comprehensive income (loss)
Beginning Balance, (in shares) at Dec. 31, 2017			27,572
Beginning Balance at Dec. 31, 2017	$ 485,329	$ 16	$ 275	$ 292,494	$ 0	$ 210,265	$ 16	$ (17,705)
Net loss	(262,987)					(262,987)
Dividends declared or accrued for common stock	(8,803)			(2,968)		(5,835)
Shares issued (in shares)			14,375
Shares issued	217,312		$ 144	217,168
Shares issued for option exercises (in shares)			27
Shares issued for option exercises	274			274
Share-based compensation expense (in shares)			165
Share-based compensation expense	4,384		$ 2	4,382
Restricted shares and performance shares forgiven for taxes and forfeited (in shares)			(35)
Restricted shares and performance shares forgiven for taxes and forfeited	(805)			(805)
Change in estimate of share-based award vesting	(1,840)			(1,890)		50
Change in fair value, net of tax	0
Reclassification adjustment for losses included in net loss, net of tax	0
Foreign currency translation loss	(13,609)							(13,609)
Ending Balance at Dec. 31, 2018	419,271	$ (51)	$ 421	508,655	0	(58,491)	$ (51)	(31,314)
Ending Balance, (in shares) at Dec. 31, 2018			42,104
Net loss	(46,741)					(46,741)
Dividends declared or accrued for common stock	(8,933)			(8,933)
Dividends accrued for preferred stock	(642)			(642)
Shares issued for option exercises (in shares)			5
Shares issued for option exercises	21			21
Share-based compensation expense (in shares)			248
Share-based compensation expense	3,933		$ 2	3,931
Restricted shares and performance shares forgiven for taxes and forfeited (in shares)			(44)
Restricted shares and performance shares forgiven for taxes and forfeited	(365)			(365)
Change in estimate of share-based award vesting	(1,052)			(1,052)
Change in fair value, net of tax	(10,479)							(10,479)
Reclassification adjustment for losses included in net loss, net of tax	1,084							1,084
Foreign currency translation loss	(3,845)							(3,845)
Ending Balance at Dec. 31, 2019	353,277		$ 423	501,615	1,076	(105,283)		(44,554)
Ending Balance, (in shares) at Dec. 31, 2019			42,313
Warrants	1,076				1,076
Net loss	(100,592)					(100,592)
Dividends accrued for preferred stock	(12,373)			(12,373)
Share-based compensation expense (in shares)			417
Share-based compensation expense	4,969		$ 4	4,965
Restricted shares and performance shares forgiven for taxes and forfeited (in shares)			(44)
Restricted shares and performance shares forgiven for taxes and forfeited	(157)			(157)
Change in estimate of share-based award vesting	(718)			(718)
Reclassification of warrants to liabilities (Note 21)	(1,076)				(1,076)
Change in fair value, net of tax	(12,443)							(12,443)
Reclassification adjustment for losses included in net loss, net of tax	18,987							18,987
Foreign currency translation loss	(1,683)							(1,683)
Sale of discontinued operations	5,961							5,961
Ending Balance at Dec. 31, 2020	254,152		$ 427	$ 493,332	$ 0	$ (205,875)		$ (33,732)
Ending Balance, (in shares) at Dec. 31, 2020			42,686
Warrants	$ 0