ACQUISITION - Schedule of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 02, 2019	Dec. 31, 2018
Liabilities [Abstract]
Goodwill	$ 0	$ 10,997		$ 0
1347 Property Insurance Holdings, Inc
Assets [Abstract]
Debt securities, available-for-sale			$ 56,929
Cash and cash equivalents			35,968
Prepaid reinsurance premium			25,279
Premiums receivable			2,977
Reinsurance recoverable			7,603
Deferred acquisition costs and value of business acquired, net			8,721
Other assets			3,507
Total assets acquired			140,984
Liabilities [Abstract]
Loss and adjustment expense reserves			16,660
Unearned premiums			50,513
Reinsurance payable			24,071
Income taxes, net			1,778
Deferred revenue			1,515
Other liabilities			7,487
Total liabilities assumed			102,024
Net specifically identifiable assets acquired			38,960
Goodwill			10,997
Net assets acquired			$ 49,957