Summary of Significant Accounting Policies (Narrative) (Details)			3 Months Ended		9 Months Ended
	Mar. 28, 2017 USD ($)	Mar. 17, 2017 USD ($) shares	Sep. 30, 2017 entity shares	Sep. 30, 2016	Sep. 30, 2017 USD ($) segment entity shares	Sep. 30, 2016 USD ($)	Mar. 24, 2017 shares	Dec. 31, 2016 shares
Summary Of Significant Accounting Policies [Line Items]
Employee stock ownership plan, shares | shares			334,997		334,997		350,000	0
Underwriting fees paid	$ 1,000,000
Net proceeds received from issuance of shares of common stock and ESOP expense					$ 28,981,491
Number of operating segments | segment					1
Impairments					$ 0	$ 0
Federal tax rate			34.00%	34.00%	34.00%	34.00%
Illinois [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration risk			31.30%	33.30%	34.50%	37.20%
Illinois Casualty Company [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of subsidiaries | entity			3		3
Surplus Notes [Member]
Summary Of Significant Accounting Policies [Line Items]
Notes converted		$ 1,650,000
Debt converted, shares issued | shares		165,000
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
ESOP threshold					1000 hours