Income (Loss) Per Share - Shares Excluded from EPS (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Common share equivalents
Diluted income (loss) per share
Common share equivalents excluded from the diluted weighted average shares outstanding since the Company incurred a net loss and their effect would be antidilutive	531	28	239
Non-participating shares
Diluted income (loss) per share
Securities excluded from the diluted calculation as their effect would be antidilutive	1,689	2,474	1,744
Convertible Notes
Diluted income (loss) per share
Securities excluded from the diluted calculation as their effect would be antidilutive	8,618	8,618	8,618