Share-Based Compensation - Activity of Stock Options (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Stock Option Activity, Additional Disclosures
Share price (in dollars per share)	$ 3.74
Service period based stock options
Number of Options
Options Outstanding Beginning Balance (in shares)	10,833	9,509
Options Granted (in shares)	1,724	3,609
Options Exercised (in shares)	(2,146)	(1,052)
Options Forfeited / Expired (in shares)	(916)	(1,233)
Options Outstanding Ending Balance (in shares)	9,495	10,833	9,509
Weighted Average Exercise Price
Options Outstanding Beginning Balance (in dollars per share)	$ 3.96	$ 3.86
Options Granted (in dollars per share)	8.67	4.18
Options Exercised (in dollars per share)	4.34	3.84
Options Forfeited / Expired (in dollars per share)	4.83	3.98
Options Outstanding, Ending Balance (in dollars per share)	$ 4.65	$ 3.96	$ 3.86
Stock Option Activity, Additional Disclosures
Options Exercisable (in shares)	6,828
Weighted Average Exercise Price, Options Exercisable (in dollars per share)	$ 3.77
Weighted Average Remaining Contractual Term, Options Outstanding	6 years 6 months	6 years 9 months 18 days	6 years 10 months 24 days
Weighted Average Remaining Contractual Term, Options Exercisable	5 years 6 months
Aggregate Intrinsic Value, Options Outstanding	$ 2,452	$ 10,472	$ 6,315
Aggregate Intrinsic Value, Options Exercised	13,301	$ 1,271
Aggregate Intrinsic Value, Options Exercisable, Ending Balance	$ 2,256
Performance based stock options
Number of Options
Options Outstanding Beginning Balance (in shares)	81	42
Options Granted (in shares)	0	164
Options Exercised (in shares)	(40)	(42)
Options Forfeited (in shares)	0	(83)
Options Outstanding Ending Balance (in shares)	41	81	42
Weighted Average Exercise Price
Options Outstanding Beginning Balance (in dollars per share)	$ 4.34	$ 1.89
Options Granted (in dollars per share)	0	4.34
Options Exercised (in dollars per share)	4.34	1.89
Options Forfeited (in dollars per share)	0	4.34
Options Outstanding, Ending Balance (in dollars per share)	$ 4.34	$ 4.34	$ 1.89
Stock Option Activity, Additional Disclosures
Weighted Average Remaining Contractual Term, Options Outstanding		3 years 1 month 6 days	3 years 1 month 6 days
Aggregate Intrinsic Value, Options Outstanding		$ 37	$ 101
Aggregate Intrinsic Value, Options Exercised	$ 401	$ 100
Options Exercisable (in shares)	41
Weighted Average Exercise Price, Options Exercisable (in dollars per share)	$ 4.34
Weighted Average Remaining Contractual Term, Options Exercisable	2 years 1 month 6 days
Weighted Average Remaining Contractual Term, Options Outstanding	2 years 1 month 6 days
Aggregate Intrinsic Value, Options Outstanding	$ 0
Aggregate Intrinsic Value, Options Exercisable	$ 0
Market Based Stock Options
Number of Options
Options Outstanding Beginning Balance (in shares)	1,000	1,000
Options Granted (in shares)	0	0
Options Exercised (in shares)	0	0
Options Forfeited (in shares)	0	0
Options Outstanding Ending Balance (in shares)	1,000	1,000	1,000
Weighted Average Exercise Price
Options Outstanding Beginning Balance (in dollars per share)	$ 4.24	$ 4.24
Options Granted (in dollars per share)	0	0
Options Exercised (in dollars per share)	0	0
Options Forfeited (in dollars per share)	0	0
Options Outstanding, Ending Balance (in dollars per share)	$ 4.24	$ 4.24	$ 4.24
Stock Option Activity, Additional Disclosures
Options Exercisable (in shares)	1,000
Weighted Average Exercise Price, Options Exercisable (in dollars per share)	$ 4.24
Weighted Average Remaining Contractual Term, Options Exercisable	5 years 9 months 18 days
Weighted Average Remaining Contractual Term, Options Outstanding	5 years 9 months 18 days	6 years 9 months 18 days	7 years 9 months 18 days
Aggregate Intrinsic Value, Options Outstanding	$ 0	$ 560	$ 70
Aggregate Intrinsic Value, Options Exercisable	$ 0