Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional paid-in capital	Warrants	Accumulated deficit	Accumulated other comprehensive income (loss)
Beginning balance (in shares) at Dec. 31, 2019		42,313
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 loss	(247,969)				(247,969)
Dividends accrued for preferred stock	(9,133)		(9,133)
Share-based compensation expense (in shares)		442
Share-based compensation expense	4,142	$ 4	4,138
Restricted shares forgiven for taxes (in shares)		(16)
Restricted shares forgiven for taxes	(76)	$ 0	(76)
Change in estimate of share-based award vesting	(577)		(577)
Reclassification of warrants to liabilities (Note 17)	(1,076)			(1,076)
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
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
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 loss	21,970				21,970
Dividends accrued for preferred stock	(3,139)		(3,139)
Share-based compensation expense (in shares)		0
Share-based compensation expense	1,435	$ 0	1,435
Restricted shares forgiven for taxes (in shares)		(8)
Restricted shares forgiven for taxes	(46)		(46)
Change in estimate of share-based award vesting	(577)		(577)
Reclassification of warrants to liabilities (Note 17)	(1,076)			(1,076)
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
Ending balance at Sep. 30, 2020	86,347	$ 427	495,967	$ 0	(353,252)	(56,795)
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Total stockholders' equity	254,152
Beginning balance (in shares) at Dec. 31, 2020		42,686
Beginning balance at Dec. 31, 2020	254,152	$ 427	493,332		(205,875)	(33,732)
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Net loss	(13,681)				(13,681)
Dividends accrued for preferred stock	$ (19,054)		(19,054)
Shares issues for option exercises (in shares)	6	6
Stock Issued During Period, Value, Stock Options Exercised	$ 48	$ 0	48
Share-based compensation expense (in shares)		394
Share-based compensation expense	2,917	$ 4	2,913
Restricted shares forgiven for taxes (in shares)		(52)
Restricted shares forgiven for taxes	(363)	$ (1)	(362)
Change in estimate of share-based award vesting	(337)		(337)
Change in fair value of interest rate swap, net of tax	(176)					(176)
Reclassification of interest rate swap settlement to net income (loss), net of tax	2,873					2,873
Foreign currency translation gain (loss)	(1,550)					(1,550)
Ending balance (in shares) at Sep. 30, 2021		43,034
Ending balance at Sep. 30, 2021	224,829	$ 430	476,540		(219,556)	(32,585)
Beginning balance (in shares) at Jun. 30, 2021		43,034
Beginning balance at Jun. 30, 2021	232,355	$ 430	477,923		(216,179)	(29,819)
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Net loss	(3,377)				(3,377)
Dividends accrued for preferred stock	(2,314)		(2,314)
Share-based compensation expense (in shares)		0
Share-based compensation expense	931	$ 0	931
Change in fair value of interest rate swap, net of tax	(176)					(176)
Reclassification of interest rate swap settlement to net income (loss), net of tax	22					22
Foreign currency translation gain (loss)	(2,612)					(2,612)
Ending balance (in shares) at Sep. 30, 2021		43,034
Ending balance at Sep. 30, 2021	224,829	$ 430	$ 476,540		$ (219,556)	$ (32,585)
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Total stockholders' equity	$ 224,829