(LOSS) EARNINGS PER COMMON SHARE - Computations for Basic and Diluted Earnings/(Loss) (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Schedule of Earnings Per Share [Line Items]
Income allocated to participating securities	$ 0	$ 0	$ (271)	$ 0	$ (153)
Less: participating securities dividends	(94)	(94)	(94)	(188)	(295)
Less: preferred stock dividends	(3,442)	(3,533)	(4,308)	(6,975)	(8,616)
Less: preferred stock redemption	49	$ 526	0	575	0
Voting
Schedule of Earnings Per Share [Line Items]
Loss from operations	(18,273)		16,426	(24,804)	23,397
Income allocated to participating securities			(268)		(152)
Less: participating securities dividends	(93)		(93)	(186)	(292)
Less: preferred stock dividends	(3,409)		(4,268)	(6,909)	(8,535)
Less: preferred stock redemption	49			570
Net income available to common stockholders	$ (21,726)		$ 11,797	$ (31,329)	$ 14,418
Weighted average common shares outstanding (in shares)	49,553,598		50,379,816	49,770,527	50,290,107
Average shares and dilutive common shares (in shares)	49,553,598		50,487,635	49,770,527	50,417,869
Basic loss per common share
Basic earnings (loss) per common share (in usd per share)	$ (0.44)	$ (0.19)	$ 0.23	$ (0.63)	$ 0.29
Diluted loss per common share
Diluted earnings (loss) per common share (in usd per share)	$ (0.44)	(0.19)	$ 0.23	$ (0.63)	$ 0.29
Voting | Restricted shares / units
Schedule of Earnings Per Share [Line Items]
Dilutive effects of stock units and stock options (in shares)	0		103,677	0	119,967
Voting | Stock Option
Schedule of Earnings Per Share [Line Items]
Dilutive effects of stock units and stock options (in shares)	0		4,142	0	7,795
Class B Common Stock
Schedule of Earnings Per Share [Line Items]
Loss from operations	$ (176)		$ 156	$ (238)	$ 222
Income allocated to participating securities			(3)		(1)
Less: participating securities dividends	(1)		(1)	(2)	(3)
Less: preferred stock dividends	(33)		(40)	(66)	(81)
Less: preferred stock redemption	0			5
Net income available to common stockholders	$ (210)		$ 112	$ (301)	$ 137
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)	$ (0.44)	(0.19)	$ 0.23	$ (0.63)	$ 0.29
Diluted loss per common share
Diluted earnings (loss) per common share (in usd per share)	$ (0.44)	$ (0.19)	$ 0.23	$ (0.63)	$ 0.29
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