Income Taxes (Schedule of Deferred Tax Assets and Deferred Tax Liabilities) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Asset
Net operating loss and tax credit carryforward	$ 22,282	$ 0
Allowance for loan losses	7,416	7,397
Pension and other benefits	4,488	4,018
Net unrealized losses on derivative instruments	3,432	3,200
Purchase accounting and deposit premium	2,856	212
Deferred compensation and benefits	2,129	945
Net unrealized losses on AFS securities	2,047	171
Net unrealized losses on postretirement plans	1,102	1,165
Allowance for OREO valuation	630	107
Allowance for OTTI on investments	17	71
Other	1,000	1,431
Total	47,399	18,717
Liability
Depreciation	4,298	1,910
Deferred loan origination fees	1,815	1,581
Prepaid expenses	813	620
MSRs	757	172
Total	$ 7,683	$ 4,283
Minimum [Member]
Income Tax Contingency [Line Items]
Open tax years	2012
Maximum [Member]
Income Tax Contingency [Line Items]
Open tax years	2014