Earnings Per Share - Components of Numerator and Denominator for Computation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Numerator:
Net loss attributable to common shareholders - Basic and Diluted	$ 4,612	$ (1,334)	$ (14,151)	$ (2,089)	$ (1,144)	$ (3,128)	$ (51,674)	$ (1,767)	$ (12,962)	$ (57,713)	$ (16,951)
Denominator:
Weighted average common shares - Basic (shares)									36,088	35,815	35,657
Effective of diluted shares:
Share-based awards (shares)									0	0	0
Weighted average common shares - Diluted (shares)									36,088	35,815	35,657
Net (loss) income per share attributable to common shareholders - Basic and diluted (usd per share)	$ 0.13	$ (0.04)	$ (0.39)	$ (0.06)	$ (0.03)	$ (0.09)	$ (1.44)	$ (0.05)	$ (0.36)	$ (1.61)	$ (0.48)