Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional paid-in capital	Warrants	Retained earnings (Accumulated deficit)	Retained earnings (Accumulated deficit) Cumulative Effect, Period of Adoption, Adjustment	Accumulated other comprehensive income (loss)
Beginning balance (in shares) at Dec. 31, 2018			42,104,000
Beginning balance at Dec. 31, 2018	$ 419,271	$ (51)	$ 421	$ 508,655		$ (58,491)	$ (51)	$ (31,314)
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Net income	(32,656)					(32,656)
Dividends declared or accrued for common stock	(8,907)			(8,907)
Shares issues for option exercises (in shares)			5,000
Shares issued for option exercises	(21)			(21)
Share-based compensation expense (in shares)			231,000
Share-based compensation expense	3,130		$ 2	3,128
Restricted shares forgiven for taxes (in shares)			(43,000)
Restricted shares forgiven for taxes	(151)			(151)
Change in estimate of share-based award vesting	(1,240)			(1,240)
Change in fair value of interest rate swap, net of tax	(11,999)							(11,999)
Reclassification of interest rate swap settlement to net income (loss), net of tax	238							238
Foreign currency translation gain (loss)	(11,354)							(11,354)
Ending balance (in shares) at Sep. 30, 2019			42,297,000
Ending balance at Sep. 30, 2019	356,302		$ 423	501,506		(91,198)		(54,429)
Beginning balance (in shares) at Jun. 30, 2019			42,367,000
Beginning balance at Jun. 30, 2019	377,329		$ 424	504,556		(85,343)		(42,308)
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Net income	(5,855)					(5,855)
Dividends declared or accrued for common stock	(2,973)			(2,973)
Shares issues for option exercises (in shares)			5,000
Shares issued for option exercises	(21)			(21)
Share-based compensation expense (in shares)			(50,000)
Share-based compensation expense	1,151		$ (1)	1,152
Restricted shares forgiven for taxes (in shares)			(25,000)
Restricted shares forgiven for taxes	(10)			(10)
Change in estimate of share-based award vesting	(1,240)			(1,240)
Change in fair value of interest rate swap, net of tax	(1,181)							(1,181)
Reclassification of interest rate swap settlement to net income (loss), net of tax	238							238
Foreign currency translation gain (loss)	(11,178)							(11,178)
Ending balance (in shares) at Sep. 30, 2019			42,297,000
Ending balance at Sep. 30, 2019	356,302		$ 423	501,506		(91,198)		(54,429)
Beginning balance (in shares) at Dec. 31, 2019			42,313,000
Beginning balance at Dec. 31, 2019	353,277		$ 423	501,615	$ 1,076	(105,283)		(44,554)
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Net income	(247,969)					(247,969)
Dividends accrued for preferred stock	(9,133)			(9,133)
Share-based compensation expense (in shares)			442,000
Share-based compensation expense	4,142		$ 4	4,138
Restricted shares forgiven for taxes (in shares)			(16,000)
Restricted shares forgiven for taxes	(76)			(76)
Reclassification of warrants to liabilities (Note 18)	(1,076)				(1,076)
Change in estimate of share-based award vesting	(577)			(577)
Change in fair value of interest rate swap, net of tax	(12,443)							(12,443)
Reclassification of interest rate swap settlement to net income (loss), net of tax	6,838							6,838
Foreign currency translation gain (loss)	(6,636)							(6,636)
Ending balance (in shares) at Sep. 30, 2020			42,739,000
Ending balance at Sep. 30, 2020	86,347		$ 427	495,967	0	(353,252)		(56,795)
Beginning balance (in shares) at Jun. 30, 2020			42,747,000
Beginning balance at Jun. 30, 2020	57,899		$ 427	498,294	1,076	(375,222)		(66,676)
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Net income	21,970					21,970
Dividends accrued for preferred stock	(3,139)			(3,139)
Share-based compensation expense	1,435			1,435
Restricted shares forgiven for taxes (in shares)			(8,000)
Restricted shares forgiven for taxes	(46)			(46)
Reclassification of warrants to liabilities (Note 18)	(1,076)				(1,076)
Change in estimate of share-based award vesting	(577)			(577)
Change in fair value of interest rate swap, net of tax	21							21
Reclassification of interest rate swap settlement to net income (loss), net of tax	3,148							3,148
Foreign currency translation gain (loss)	6,712							6,712
Ending balance (in shares) at Sep. 30, 2020			42,739,000
Ending balance at Sep. 30, 2020	$ 86,347		$ 427	$ 495,967	$ 0	$ (353,252)		$ (56,795)