CONSOLIDATED CONDENSED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Fixed maturities, amortized cost	$ 64,361,388	$ 63,268,660
Fixed maturities, allowance for credit losses	82,081
Fixed maturities, fair value	2,947,350	3,025,790
Equity securities, cost	511,614	534,463
Mortgage loans, allowance for credit losses	173,186	4,884
Investment real estate, accumulated depreciation	287	203
Reinsurance allowance, allowance for credit loss	102,673	0
Other intangibles, accumulated amortization	283,593	253,759
Property and equipment, accumulated depreciation	$ 58,995	$ 49,357
Preferred Stock, par value (in dollars per share)	$ 1	$ 1
Preferred Stock, shares authorized (in shares)	2,000	2,000
Preferred Stock, Liquidation preference	$ 2	$ 2
Common Stock, par value (in dollars per share)	$ 1	$ 1
Common Stock, shares authorized (in shares)	5,000,000	5,000,000
Common Stock, shares issued (in shares)	5,000,000	5,000,000
Net unrealized gains on investments, income tax	$ 598,862	$ 383,311
Net unrealized gains on investments with credit losses, tax	(7,473)
Net unrealized (losses) gains relating to other-than-temporary impaired investments for which a portion has been recognized in earnings, income tax		(7,004)
Accumulated loss - derivatives, income tax	$ (2,201)	$ (2,123)