Earnings (Loss) Per Share - Securities Excluded from the Computation of Diluted Earnings (Loss) Per Common Share (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded in computation of diluted earning per share (in shares)	511	382	486	462
Restricted stock awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded in computation of diluted earning per share (in shares)	3	31	27	129
Performance-based warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded in computation of diluted earning per share (in shares)	275	175	275	175