Reinsurance and Policy Benefits and Losses, Claims, and Loss Expenses Payable (Activity in the Liability for Unpaid Losses and Loss Adjustment Expenses for Property and Casualty Insurance) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Paid related to:
Net balance at December 31	$ 122,044
Plus: reinsurance recoverables	87,083
Balance at December 31	209,127
Property and Casualty Insurance [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Balance at January 1	228,970	$ 233,554	$ 244,400
Less: reinsurance recoverables	94,920	94,490	103,952
Net balance at January 1	134,050	139,064	140,448
Incurred related to:
Current year	22,137	19,579	15,749
Prior years	(9,535)	(5,365)	233
Total incurred	12,602	14,214	15,982
Paid related to:
Current year	7,366	8,838	8,969
Prior years	17,242	10,390	8,397
Total paid	24,608	19,228	17,366
Net balance at December 31	122,044	134,050	139,064
Plus: reinsurance recoverables	87,083	94,920	94,490
Balance at December 31	209,127	228,970	$ 233,554
Operating Segments [Member] | Property and Casualty Insurance [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Balance at January 1	228,970
Paid related to:
Balance at December 31	$ 209,127	$ 228,970