Income Tax - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Valuation Allowance [Line Items]
Decrease in deferred tax assets	$ 5,800
Valuation allowance	9,815	$ 15,736	$ 17,568
Additional paid-in capital	509,018	$ 504,530
Unrecorded deferred tax liability	8,847
Ameriana
Valuation Allowance [Line Items]
Additional paid-in capital	11,883
CFS
Valuation Allowance [Line Items]
Additional paid-in capital	13,393
State and Local Jurisdiction
Valuation Allowance [Line Items]
State tax loss carryforward	91,143
State deferred tax assets	10,491
Valuation allowance	9,815
Available for Sale Securities
Valuation Allowance [Line Items]
Decrease in deferred tax liability	6,079
Loans
Valuation Allowance [Line Items]
Decrease in deferred tax assets	3,670
Other Real Estate Owned
Valuation Allowance [Line Items]
Decrease in deferred tax assets	2,592
Operating Loss Carryforwards | Federal
Valuation Allowance [Line Items]
Decrease in deferred tax assets	2,308
Pension And Other Employee Benefits
Valuation Allowance [Line Items]
Decrease in deferred tax assets	$ 2,164