Liabilities for Unpaid Losses, Claims and Loss Adjustment Expenses (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Liabilities for Unpaid Losses, Claims and Loss Adjustment Expenses [Roll Forward]
Beginning liabilities for unpaid losses, claims and loss adjustment expenses, gross				$ 65,689
Paid related to [Abstract]
Ending liabilities for unpaid losses, claims and loss adjustment expenses, gross		$ 72,075		72,075
Reconciliation of total incurred claims to total insurance benefits and losses incurred [Abstract]
Total incurred losses				63,067	$ 54,428
Cash surrender value and matured endowments				707	817
Benefit reserve changes				1,617	1,784
Total insurance benefits and losses incurred		32,219	$ 27,032	65,391	57,029
Property and Casualty Insurance Products [Member]
Liabilities for Unpaid Losses, Claims and Loss Adjustment Expenses [Roll Forward]
Beginning liabilities for unpaid losses, claims and loss adjustment expenses, gross				47,997	49,556
Less: Reinsurance recoverable on unpaid losses				(7,220)	(9,806)
Beginning liabilities for unpaid losses, claims and loss adjustment expenses, net				40,777	39,750
Incurred related to [Abstract]
Current accident year				18,531	17,306
Prior accident year development	[1]			(659)	(1,090)
Total incurred				17,872	16,216
Paid related to [Abstract]
Current accident year				5,736	5,631
Prior accident years				10,363	10,065
Total paid				16,099	15,696
Ending liabilities for unpaid losses, claims and loss adjustment expenses, net		42,550	40,270	42,550	40,270
Plus: Reinsurance recoverable on unpaid losses		7,760	10,027	7,760	10,027
Ending liabilities for unpaid losses, claims and loss adjustment expenses, gross		50,310	50,297	50,310	50,297
Medicare Supplement Insurance Products [Member]
Liabilities for Unpaid Losses, Claims and Loss Adjustment Expenses [Roll Forward]
Beginning liabilities for unpaid losses, claims and loss adjustment expenses, gross				15,859	11,263
Less: Reinsurance recoverable on unpaid losses				(4,748)	(990)
Beginning liabilities for unpaid losses, claims and loss adjustment expenses, net				11,111	10,273
Incurred related to [Abstract]
Current accident year				39,951	33,674
Prior accident year development				606	587
Total incurred				40,557	34,261
Paid related to [Abstract]
Current accident year				27,722	24,301
Prior accident years				11,006	9,706
Total paid				38,728	34,007
Ending liabilities for unpaid losses, claims and loss adjustment expenses, net		12,940	10,527	12,940	10,527
Plus: Reinsurance recoverable on unpaid losses		6,907	2,746	6,907	2,746
Ending liabilities for unpaid losses, claims and loss adjustment expenses, gross		19,847	13,273	19,847	13,273
Other Life and Health Insurance Products [Member]
Liabilities for Unpaid Losses, Claims and Loss Adjustment Expenses [Roll Forward]
Beginning liabilities for unpaid losses, claims and loss adjustment expenses, gross				1,833	1,743
Less: Reinsurance recoverable on unpaid losses				0	0
Beginning liabilities for unpaid losses, claims and loss adjustment expenses, net				1,833	1,743
Incurred related to [Abstract]
Current accident year				4,748	3,995
Prior accident year development				(110)	(44)
Total incurred				4,638	3,951
Paid related to [Abstract]
Current accident year				3,050	2,685
Prior accident years				1,503	1,524
Total paid				4,553	4,209
Ending liabilities for unpaid losses, claims and loss adjustment expenses, net		1,918	1,485	1,918	1,485
Plus: Reinsurance recoverable on unpaid losses		0	0	0	0
Ending liabilities for unpaid losses, claims and loss adjustment expenses, gross		$ 1,918	$ 1,485	$ 1,918	$ 1,485

[1] In establishing property and casualty reserves, the Company initially reserves for losses at the higher end of the reasonable range if no other value within the range is determined to be more probable. Selection of such an initial loss estimate is an attempt by management to give recognition that initial claims information received generally is not conclusive with respect to legal liability, is generally not comprehensive with respect to magnitude of loss and generally, based on historical experience, will develop more adversely as time passes and more information becomes available. Accordingly, the Company generally experiences reserve redundancies when analyzing the development of prior year losses in a current period.