Policy and Claim Reserves (Property and Casualty Reserve) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Reinsurance recoverable	$ 1,004		$ 1,780
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Estimated claims and claim adjustment expenses for claims arising in prior years	(751)	$ (839)
Consolidated Property and Casualty Insurance Entity [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Policy and contract claims	7,812	8,244	7,531	$ 9,645
Reinsurance recoverable	526	1,272	1,184	1,380
Net balance at end of year	7,286	6,972	$ 6,347	$ 8,265
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Provision for claims and claim adjustment expenses for claims arising in current year	10,786	8,877
Estimated claims and claim adjustment expenses for claims arising in prior years	(751)	(839)
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims	10,035	8,038
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year	7,090	5,785
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years	2,006	3,546
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid	$ 9,096	$ 9,331