Summary of Significant Accounting Policies (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($) Subsidiary	Dec. 31, 2016 USD ($)
Principles of Consolidation [Abstract]
Number of insurance subsidiaries owned by the parent | Subsidiary		4
Number of non-insurance subsidiaries owned by the parent | Subsidiary		1
Investments
Estimated fair value		$ 1,369	$ 1,264
Recently Issued Accounting Standards [Abstract]
Federal corporate tax rate		35.00%
Equity securities available-for-sale		$ 23,355	$ 20,257
Plan [Member]
Recently Issued Accounting Standards [Abstract]
Federal corporate tax rate	21.00%
ASU 2016-01 [Member]
Recently Issued Accounting Standards [Abstract]
Equity securities available-for-sale		23,355
Equity securities unrealized gains, net of tax		9,825
New accounting pronouncement, effect of change on income, net of tax		$ 2,361
ASU 2018-02 [Member] | Plan [Member] | Retained Earnings [Member]
Recently Issued Accounting Standards [Abstract]
Reclassification of standard tax effects on AOCI and retained earnings	$ 2,100
ASU 2018-02 [Member] | Plan [Member] | Accumulated Other Comprehensive Income [Member]
Recently Issued Accounting Standards [Abstract]
Reclassification of standard tax effects on AOCI and retained earnings	$ (2,100)