Earnings Per Common Share - Computations of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Numerator:
Loss from continuing operations	$ (10,739)	$ (22,330)	$ (27,337)	$ (46,344)
Allocation of earnings to unvested restricted share awards	(68)	121	(191)	(349)
Adjusted net loss from continuing operations	(10,807)	(22,209)	(27,528)	(46,693)
Income from discontinued operations	0	53,649	0	69,524
Allocation of earnings from discontinued operations to unvested restricted share awards	0	(283)	0	0
Adjusted income from discontinuing operations	0	53,366	0	69,524
Adjusted net (loss) income	(10,807)	31,157	(27,528)	22,831
Adjusted net (loss) income	$ (10,807)	$ 31,157	$ (27,528)	$ 22,831
Denominator:
Weighted average shares outstanding - basic (in shares)	87,453	84,496	87,354	84,457
Earnings per common share, basic:
Continuing operations, basic (in dollars per share)	$ (0.12)	$ (0.26)	$ (0.32)	$ (0.55)
Discontinued operations, basic (in dollars per share)	0	0.63	0	0.82
Basic net income (loss) per common share (in dollars per share)	(0.12)	0.37	(0.32)	0.27
Earnings per common share, diluted:
Continuing operations, diluted (in dollars per share)	(0.12)	(0.26)	(0.32)	(0.55)
Discontinued operations, diluted (in dollars per share)	0	0.63	0	0.82
Diluted net income (loss) per common share (in dollars per share)	(0.12)	0.37	(0.32)	0.27
Dividends declared per common share (in dollars per share)	$ 0.17	$ 0.17	$ 0.51	$ 0.77