Business Combinations Pro Forma Information (Details) - USD ($) $ / shares in Units, shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
First Clover Leaf [Member]
Business Acquisition [Line Items]
Business Acquisition, Transaction Costs	$ 785,000		$ 785,000
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual			1,641,000
Business Acquisitions Pro Forma Net Interest Income	21,255,000	$ 18,774,000	63,727,000	$ 54,867,000
Business Acquisitions Pro Forma Provision For Loan Losses	1,363,000	538,000	2,209,000	446,000
Business Acquisitions Pro Forma Non-Interest Income	7,322,000	5,624,000	21,640,000	16,299,000
Business Acquisitions Pro Forma Non-Interest Expense	20,039,000	18,534,000	57,145,000	48,367,000
Business Acquisitions Pro Forma Income before Income Taxes	7,175,000	5,326,000	26,013,000	22,353,000
Business Acquisitions Pro Forma, Income Tax Expense	2,481,000	1,717,000	9,079,000	7,583,000
Business Acquisition, Pro Forma Net Income (Loss)	4,694,000	3,609,000	16,934,000	14,770,000
Business Acquisitions Pro Forma, Dividends On Preferred Shares	0	550,000	825,000	1,650,000
Business Acquisitions Pro Forma, Net Income Available To Common Stockholders	$ 4,694,000	$ 3,059,000	$ 16,109,000	$ 13,120,000
Business Acquisition, Pro Forma Earnings Per Share, Basic	$ 450	$ 340	$ 1,720	$ 1,690
Business Acquisition, Pro Forma Earnings Per Share, Diluted	$ 450	$ 350	$ 1,680	$ 1,620
Weighted Average Basic Shares Outstanding, Pro Forma	10,497,072	9,043,283	9,372,547	7,763,067
Pro Forma Weighted Average Shares Outstanding, Diluted	10,504,046	10,406,419	10,057,398	9,126,203
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual			$ 663,000
OldNationalBankBranches [Member]
Business Acquisition [Line Items]
Business Acquisition, Transaction Costs		$ 1,400,000		$ 1,400,000
Business Acquisitions Pro Forma Net Interest Income		17,762,000		49,575,000
Business Acquisitions Pro Forma Provision For Loan Losses		662,000		1,292,000
Business Acquisitions Pro Forma Non-Interest Income		6,811,000		19,750,000
Business Acquisitions Pro Forma Non-Interest Expense		15,304,000		43,617,000
Business Acquisitions Pro Forma Income before Income Taxes		8,607,000		24,416,000
Business Acquisitions Pro Forma, Income Tax Expense		3,017,000		8,766,000
Business Acquisition, Pro Forma Net Income (Loss)		5,590,000		15,650,000
Business Acquisitions Pro Forma, Dividends On Preferred Shares		550,000		1,650,000
Business Acquisitions Pro Forma, Net Income Available To Common Stockholders		$ 5,040,000		$ 14,000,000
Business Acquisition, Pro Forma Earnings Per Share, Basic		$ 600		$ 1,850
Business Acquisition, Pro Forma Earnings Per Share, Diluted		$ 570		$ 1,760
Weighted Average Basic Shares Outstanding, Pro Forma		8,421,397		7,553,468
Pro Forma Weighted Average Shares Outstanding, Diluted		9,784,533		8,916,604