DEBT (Narrative) (Details) - USD ($)		12 Months Ended
	Feb. 02, 2016	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 15, 2020	Mar. 31, 2020
New Credit Agreement
Line of Credit Facility [Line Items]
Interest expense incurred		$ 0
Option to increase, maximum amount						$ 100,000,000
Outstanding balance		0
Previous Credit Agreement
Line of Credit Facility [Line Items]
Interest expense incurred			$ 0	$ 0
Maximum borrowing capacity	$ 100,000,000
Outstanding balance			$ 0
Credit Facility | New Credit Agreement
Line of Credit Facility [Line Items]
Maximum borrowing capacity						50,000,000
Credit Facility | Previous Credit Agreement
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 50,000,000
Debt instrument, term	4 years
Letter of Credit Subfacility | New Credit Agreement
Line of Credit Facility [Line Items]
Maximum borrowing capacity						20,000,000
Letter of Credit Subfacility | Previous Credit Agreement
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 20,000,000
Swingline Subfacility | New Credit Agreement
Line of Credit Facility [Line Items]
Maximum borrowing capacity						$ 5,000,000
Swingline Subfacility | Previous Credit Agreement
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 5,000,000
Surplus Notes
Line of Credit Facility [Line Items]
Principal amount					$ 50,000,000
Interest expense incurred		133,000
Surplus Notes | Federated Mutual
Line of Credit Facility [Line Items]
Principal amount		35,000,000
Surplus Notes | Federated Life
Line of Credit Facility [Line Items]
Principal amount		$ 15,000,000