Reinsurance and Policy Benefits and Losses, Claims and Loss Expenses Payable (Insurance Subsidiaries Activity) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Year ended December 31,
Direct amount (a) - Life insurance in force	[1]	$ 941,822	$ 947,720	$ 937,779
Ceded to other companies - Life insurance in force		207	248	249
Assumed from other companies - Life insurance in force		548,152	876,865	915,769
Net amount (a) - Life insurance in force		$ 1,489,767	$ 1,824,337	$ 1,853,299
Percentage of amount assumed to net - Life insurance in force		37.00%	48.00%	49.00%
Direct amount (a)	[1]	$ 191,573	$ 199,512	$ 202,535
Ceded to other companies		266	368	310
Assumed from other companies		(66,971)	12,659	13,688
Net amount (a)		124,336	211,803	215,913
Premiums earned: Life [Member]
Year ended December 31,
Direct amount (a)	[1]	51,691	51,227	50,251
Ceded to other companies		(1)	4
Assumed from other companies		(69,616)	9,880	10,626
Net amount (a)		$ (17,924)	$ 61,103	$ 60,877
Percentage of amount assumed to net		388.00%	16.00%	17.00%
Premiums earned: Accident and health [Member]
Year ended December 31,
Direct amount (a)	[1]	$ 77,813	$ 90,396	$ 99,450
Ceded to other companies		267	295	310
Assumed from other companies		1,851	1,977	2,263
Net amount (a)		$ 79,397	$ 92,078	$ 101,403
Percentage of amount assumed to net		2.00%	2.00%	2.00%
Premiums earned: Annuity [Member]
Year ended December 31,
Direct amount (a)	[1]	$ 1,221	$ 728	$ 505
Ceded to other companies
Assumed from other companies		794	794	794
Net amount (a)		$ 2,015	$ 1,522	$ 1,299
Percentage of amount assumed to net		39.00%	52.00%	61.00%
Premiums earned: Property and casualty [Member]
Year ended December 31,
Direct amount (a)	[1]	$ 60,848	$ 57,161	$ 52,329
Ceded to other companies			69
Assumed from other companies			8	5
Net amount (a)		$ 60,848	$ 57,100	$ 52,334
Percentage of amount assumed to net		0.00%	0.00%	0.00%

[1] Balances are reported net of inter-segment transactions