CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock Common Class A	Common Stock Common Class B	Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2020		136,913,375	4,045,199
Beginning balance at Dec. 31, 2020	$ 644,738	$ 1,369	$ 40	$ 1,662,155	$ (1,017,037)	$ (1,789)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(21,648)				(21,648)
Compensation expense related to granting of stock awards (in shares)		291,347
Compensation expense related to granting of stock awards	2,578	$ 3		2,575
Exercise of stock options (in shares)		47,535
Exercise of stock options	15	$ 0		15
Purchase of vested employee restricted stock units (in shares)		(347,607)
Purchase of vested employee restricted stock units	(1,911)	$ (3)		(1,908)
Payment of dividends on common stock	(386)			(386)
Dividend equivalents, net of forfeitures	386				386
Net Change in Accumulated Derivative Unrealized Gain (Loss)	553					553
Ending balance (in shares) at Mar. 31, 2021		136,904,650	4,045,199
Ending balance at Mar. 31, 2021	624,325	$ 1,369	$ 40	1,662,451	(1,038,299)	(1,236)
Beginning balance (in shares) at Dec. 31, 2021		140,060,355	4,045,199
Beginning balance at Dec. 31, 2021	652,205	$ 1,401	$ 40	1,671,195	(1,020,142)	(289)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(11,073)				(11,073)
Compensation expense related to granting of stock awards (in shares)		(59,352)
Compensation expense related to granting of stock awards	2,698	$ (1)		2,699
Issuance of common stock related to the Employee Stock Purchase Plan (ESPP) (in shares)		61,009
Issuance of common stock related to the Employee Stock Purchase Plan ("ESPP")	$ 177	$ 1		176
Exercise of stock options (in shares)	0
Purchase of vested employee restricted stock units (in shares)		(621,876)
Purchase of vested employee restricted stock units	$ (1,839)	$ (6)		(1,833)
Payment of dividends on common stock	(174)			(174)
Dividend equivalents, net of forfeitures	202				202
Net Change in Accumulated Derivative Unrealized Gain (Loss)	1,223					1,223
Ending balance (in shares) at Mar. 31, 2022		139,440,136	4,045,199
Ending balance at Mar. 31, 2022	$ 643,419	$ 1,395	$ 40	$ 1,672,063	$ (1,031,013)	$ 934