Income (Loss) Per Share - Anti-dilutive Common Shares (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, weighted average, amount (shares)	1,772	7	1,398	7
Anti-dilutive securities excluded from computation of diluted income per share (in shares)	1	765	3	227
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, weighted average, amount (shares)	591	0	480	76
Anti-dilutive securities excluded from computation of diluted income per share (in shares)	4	534	41	85