Subsequent Event (Details)	3 Months Ended
	Mar. 31, 2016 $ / shares shares	Dec. 31, 2015 $ / shares
Business Acquisition [Line Items]
Subsequent Event, Date	Apr. 26, 2016
Common stock, par value (in dollars per share)	$ 4	$ 4
First Clover Leaf Financial [Member]
Business Acquisition [Line Items]
Percent Of Acquiree Outstanding Stock Being Acquired In Merger	1
Par Value Of Outstanding Stock Being Acquired In Merger	$ 0.10
Right To Receive Value of Cash Option	$ 12.87
Right To Receive Value Of Share Option | shares	0.495