Income (Loss) Per Share - Shares Excluded from EPS (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Common share equivalents
Diluted income (loss) per share
Securities excluded from the diluted calculation as their effect would be antidilutive	627	320
Potentially dilutive shares
Diluted income (loss) per share
Securities excluded from the diluted calculation as their effect would be antidilutive	1,485	2,426
Convertible Notes
Diluted income (loss) per share
Securities excluded from the diluted calculation as their effect would be antidilutive	8,618	8,618