INVESTMENTS Debt and Short-term Investments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Other invested assets
Other investments	$ 53,562		$ 70,441
Investments pledged as collateral	$ 15,100
Investment in Federal Home Loan Bank Stock	us-gaap:AssetPledgedAsCollateralMember
Federal Home Loan Bank Borrowings, Fair Value Disclosure	$ 0
Cash and Short-term Investments
Cash	42,701		46,203
Investment In Low Income Housing Tax Credit Partnership Net Of Amortization
Other invested assets
Other investments	22,400		23,300
Total tax benefit on investments in housing tax credit partnership	900	$ 600
Qualified Affordable Housing Project Investments, Commitment	8,000
Investment in Private Funds
Other invested assets
Other investments	17,500		$ 46,000
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	13,500
Investment in Restricted Stock
Other invested assets
Other investments	$ 12,100