EARNINGS (LOSS) PER COMMON SHARE - Computations for Basic and Diluted Earnings/(Loss) (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Schedule of Earnings Per Share [Line Items]
Less: Income allocated to participating securities	$ (281)	$ 0	$ 0	$ 0	$ 0
Less: participating securities dividends	(94)	(94)	(94)	(282)	(390)
Less: preferred stock dividends	(3,447)	(3,442)	(3,403)	(10,422)	(12,019)
Less: preferred stock redemption	(7)	$ 49	(5,093)	568	(5,093)
Voting
Schedule of Earnings Per Share [Line Items]
Net (loss) income	15,761		(13,999)	(9,043)	9,398
Less: Income allocated to participating securities	(278)		0	0	0
Less: participating securities dividends	(93)		(93)	(279)	(386)
Less: preferred stock dividends	(3,414)		(3,371)	(10,323)	(11,906)
Less: preferred stock redemption	(7)		(5,045)	563	(5,045)
Net income (loss) allocated to common stockholders	$ 11,969		$ (22,508)	$ (19,082)	$ (7,939)
Weighted average common shares outstanding (in shares)	49,631,334		50,404,906	49,723,791	50,327,108
Average shares and dilutive common shares (in shares)	49,713,612		50,404,906	49,723,791	50,327,108
Basic loss per common share
Basic earnings (loss) per common share (in usd per share)	$ 0.24	$ (0.44)	$ (0.45)	$ (0.38)	$ (0.16)
Diluted loss per common share
Diluted earnings (loss) per common share (in usd per share)	$ 0.24	(0.44)	$ (0.45)	$ (0.38)	$ (0.16)
Voting | Restricted shares / units
Schedule of Earnings Per Share [Line Items]
Dilutive effects of stock units and stock options (in shares)	82,278		0	0	0
Voting | Stock Option
Schedule of Earnings Per Share [Line Items]
Dilutive effects of stock units and stock options (in shares)	0		0	0	0
Class B Common Stock
Schedule of Earnings Per Share [Line Items]
Net (loss) income	$ 152		$ (133)	$ (86)	$ 89
Less: Income allocated to participating securities	(3)		0	0	0
Less: participating securities dividends	(1)		(1)	(3)	(4)
Less: preferred stock dividends	(33)		(32)	(99)	(113)
Less: preferred stock redemption	0		(48)	5	(48)
Net income (loss) allocated to common stockholders	$ 115		$ (214)	$ (183)	$ (76)
Weighted average common shares outstanding (in shares)	477,321		477,321	477,321	477,321
Average shares and dilutive common shares (in shares)	477,321		477,321	477,321	477,321
Basic loss per common share
Basic earnings (loss) per common share (in usd per share)	$ 0.24	(0.44)	$ (0.45)	$ (0.38)	$ (0.16)
Diluted loss per common share
Diluted earnings (loss) per common share (in usd per share)	$ 0.24	$ (0.44)	$ (0.45)	$ (0.38)	$ (0.16)
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	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	0	0