Reinsurance and Policy Benefits and Losses, Claims and Loss Expenses Payable (Insurance Subsidiaries Activity) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Year ended December 31,
Direct amount (a) - Life insurance in force	$ 1,031,634	$ 957,280	$ 941,822
Ceded to other companies - Life insurance in force	73	7	207
Assumed from other companies - Life insurance in force	356,266	441,563	548,152
Net amount (a) - Life insurance in force	$ 1,387,827	$ 1,398,836	$ 1,489,767
Percentage of amount assumed to net - Life insurance in force	26.00%	32.00%	37.00%
Direct amount (a)	$ 185,635	$ 189,343	$ 191,573
Ceded to Other Companies	212	227	266
Assumed from Other Companies	6,471	8,001	(66,971)
Net amount (a)	191,894	197,117	124,336
Premiums earned: Life [Member]
Year ended December 31,
Direct amount (a)	58,048	53,289	51,691
Ceded to Other Companies	1	1	(1)
Assumed from Other Companies	5,049	5,629	(69,616)
Net amount (a)	$ 63,096	$ 58,917	$ (17,924)
Percentage of amount assumed to net	8.00%	10.00%	388.00%
Premiums earned: Accident and health [Member]
Year ended December 31,
Direct amount (a)	$ 57,081	$ 66,863	$ 77,813
Ceded to Other Companies	211	226	267
Assumed from Other Companies	1,388	1,563	1,851
Net amount (a)	$ 58,258	$ 68,200	$ 79,397
Percentage of amount assumed to net	2.00%	2.00%	2.00%
Premiums earned: Annuity [Member]
Year ended December 31,
Direct amount (a)	$ 221	$ 65	$ 1,221
Ceded to Other Companies	0	0	0
Assumed from Other Companies	34	794	794
Net amount (a)	$ 255	$ 859	$ 2,015
Percentage of amount assumed to net	13.00%	92.00%	39.00%
Premiums earned: Property and casualty [Member]
Year ended December 31,
Direct amount (a)	$ 70,285	$ 69,126	$ 60,848
Ceded to Other Companies	0	0	0
Assumed from Other Companies	0	15	0
Net amount (a)	$ 70,285	$ 69,141	$ 60,848
Percentage of amount assumed to net	0.00%	0.00%	0.00%