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EARNINGS PER COMMON SHARE - Computations for Basic and Diluted Earnings/(Loss) (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Schedule of Earnings Per Share [Line Items]
Less: participating securities dividends	$ (94)	$ (93)	$ (202)
Less: preferred stock dividends	(3,533)	(3,540)	(4,308)
Less: preferred stock redemption	(526)	$ 0	0
Voting
Schedule of Earnings Per Share [Line Items]
Loss from operations	(6,531)		6,971
Less: participating securities dividends	(93)		(200)
Less: preferred stock dividends	(3,500)		(4,267)
Less: preferred stock redemption	521
Net income available to common stockholders	$ (9,603)		$ 2,504
Weighted average common shares outstanding (in shares)	49,987,456		50,199,401
Average shares and dilutive common shares (in shares)	49,987,456		50,369,400
Basic loss per common share
Basic earnings (loss) per common share (in usd per share)	$ (0.19)	$ 0.21	$ 0.05
Diluted loss per common share
Diluted earnings (loss) per common share (in usd per share)	$ (0.19)	0.20	$ 0.05
Voting | Restricted shares / units
Schedule of Earnings Per Share [Line Items]
Dilutive effects of stock units and stock options (in shares)	0		160,299
Voting | Stock Option
Schedule of Earnings Per Share [Line Items]
Dilutive effects of stock units and stock options (in shares)	0		9,700
Class B Common Stock
Schedule of Earnings Per Share [Line Items]
Loss from operations	$ (62)		$ 66
Less: participating securities dividends	(1)		(2)
Less: preferred stock dividends	(33)		(41)
Less: preferred stock redemption	5
Net income available to common stockholders	$ (91)		$ 23
Weighted average common shares outstanding (in shares)	477,321		477,321
Average shares and dilutive common shares (in shares)	477,321		477,321
Basic loss per common share
Basic earnings (loss) per common share (in usd per share)	$ (0.19)	0.21	$ 0.05
Diluted loss per common share
Diluted earnings (loss) per common share (in usd per share)	$ (0.19)	$ 0.21	$ 0.05
Class B Common Stock | Restricted shares / units
Schedule of Earnings Per Share [Line Items]
Dilutive effects of stock units and stock options (in shares)	0		0
Class B Common Stock | Stock Option
Schedule of Earnings Per Share [Line Items]
Dilutive effects of stock units and stock options (in shares)	0		0

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