EQUITY AND CHANGES IN OTHER COMPREHENSIVE INCOME - Equity (Details) - USD ($)						1 Months Ended	9 Months Ended
	Sep. 22, 2020	Jun. 30, 2020	Mar. 27, 2020	Mar. 03, 2020	Jan. 24, 2020	Jan. 31, 2020	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018
Class of Stock [Line Items]
Total equity		$ 189,741,000					$ 194,411,000	$ 173,544,000	$ 179,424,000	$ 167,255,000	$ 154,996,000
Common stock, dividends, declared (in dollars per share)	$ 0.16	$ 0.16	$ 0.16
Cash dividend					$ 1,700,000
Common stock, dividend rate, percentage				10.00%		10.00%
Dividend shares (in shares)				1,077,061		1,077,121
Preferred stock dividends declared							22,200	27,500
Distribution of PDL earnings							594,000	0
Preferred Stock
Class of Stock [Line Items]
Total equity		$ 500,000					$ 480,000	$ 500,000	500,000	550,000	1,224,000
Shares converted (in shares)							20	724
Common Stock
Class of Stock [Line Items]
Total equity		$ 1,213,000					$ 1,214,000	$ 1,105,000	$ 1,213,000	$ 1,105,000	$ 1,095,000
Shares converted (in shares)							2,751	90,532
Corporate Joint Venture | PDL LLC
Class of Stock [Line Items]
Ownership percentage							51.00%