INVESTMENT IN RELATED PARTY INVESTMENT FUND Summarized Statements of Assets, Liabilities and Net Assets of SILP (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Liabilities
GLRE Limited Partners’ share of Net Assets	$ 189,898	$ 240,056
Solasglas Investment LP (SILP)
Assets
Investments, at fair value	108,514	162,928
Derivative contracts, at fair value	5,346	6,324
Due from brokers	84,981	68,060
Cash and cash equivalents	107,906	111,046
Interest and dividends receivable	3	47
Total assets	306,750	348,405
Liabilities
Investments sold short, at fair value	(44,736)	(47,834)
Derivative contracts, at fair value	(16,969)	(2,054)
Due to brokers	(8,306)	(1,180)
Interest and dividends payable	(129)	(828)
Other liabilities	(57)	(101)
Total liabilities	(70,197)	(51,997)
Net Assets	236,553	296,408
GLRE Limited Partners’ share of Net Assets	$ 189,898	$ 240,056