Business Combinations Assets Acquired and Liabilities Assumed (Details) - OldNationalBankBranches [Member] $ in Thousands	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015 USD ($)	Aug. 14, 2015 USD ($)
Business Acquisition [Line Items]
Business Combination Recognized Identifiable Assets Acquired and LIabilities Assumed, cash on hand			$ 279,468
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans			(152,397)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Premises And Equipment			(4,422)
Business Acquisition, Goodwill, Expected Tax Deductible Amount			14,274
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill			6,216
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets			1,174
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets			457,951
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits			453,647
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Securities Sold Under Agreements to Repurchase			3,797
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Liabilities			507
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities			$ 457,951
Business Acquisition, Transaction Costs		$ 1,400
Business Acquisition Deposit Premium Rate On Core Deposits			0.036
Finite-Lived Intangible Asset, Useful Life	10 years
Acquired Book Value [Member]
Business Acquisition [Line Items]
Business Combination Recognized Identifiable Assets Acquired and LIabilities Assumed, cash on hand			$ 279,468
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans			(155,774)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Premises And Equipment			(4,547)
Business Acquisition, Goodwill, Expected Tax Deductible Amount			0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill			0
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets			1,433
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets			441,222
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits			452,810
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Securities Sold Under Agreements to Repurchase			3,797
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Liabilities			507
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities			457,114
Fair Value Adjustment [Member]
Business Acquisition [Line Items]
Business Combination Recognized Identifiable Assets Acquired and LIabilities Assumed, cash on hand			0
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans			(3,377)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Premises And Equipment			(125)
Business Acquisition, Goodwill, Expected Tax Deductible Amount			14,274
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill			6,216
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets			(259)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets			16,729
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits			837
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Securities Sold Under Agreements to Repurchase			0
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Liabilities			0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities			$ 837