Reinsurance and Policy Benefits and Losses, Claims and Loss Expenses Payable (Insurance Subsidiaries Activity) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Year ended December 31,
Direct amount (a) - Life insurance in force	$ 957,280	$ 941,822	$ 947,720
Ceded to other companies - Life insurance in force	7	207	248
Assumed from other companies - Life insurance in force	441,563	548,152	876,865
Net amount (a) - Life insurance in force	$ 1,398,836	$ 1,489,767	$ 1,824,337
Percentage of amount assumed to net - Life insurance in force	32.00%	37.00%	48.00%
Direct amount (a)	$ 189,343	$ 191,573	$ 199,512
Ceded to other companies	227	266	368
Assumed from other companies	8,001	(66,971)	12,659
Net amount (a)	197,117	124,336	211,803
Premiums earned: Life [Member]
Year ended December 31,
Direct amount (a)	53,289	51,691	51,227
Ceded to other companies	1	(1)	4
Assumed from other companies	5,629	(69,616)	9,880
Net amount (a)	$ 58,917	$ (17,924)	$ 61,103
Percentage of amount assumed to net	10.00%	388.00%	16.00%
Premiums earned: Accident and health [Member]
Year ended December 31,
Direct amount (a)	$ 66,863	$ 77,813	$ 90,396
Ceded to other companies	226	267	295
Assumed from other companies	1,563	1,851	1,977
Net amount (a)	$ 68,200	$ 79,397	$ 92,078
Percentage of amount assumed to net	2.00%	2.00%	2.00%
Premiums earned: Annuity [Member]
Year ended December 31,
Direct amount (a)	$ 65	$ 1,221	$ 728
Ceded to other companies	0	0	0
Assumed from other companies	794	794	794
Net amount (a)	$ 859	$ 2,015	$ 1,522
Percentage of amount assumed to net	92.00%	39.00%	52.00%
Premiums earned: Property and casualty [Member]
Year ended December 31,
Direct amount (a)	$ 69,126	$ 60,848	$ 57,161
Ceded to other companies	0	0	69
Assumed from other companies	15	0	8
Net amount (a)	$ 69,141	$ 60,848	$ 57,100
Percentage of amount assumed to net	0.00%	0.00%	0.00%