FHLB Advances and Other Borrowings (Schedule of Repurchase Agreements) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Long-term Advances from Federal Home Loan Bank collateralized by qualifying mortgages, investment securities, and mortgage-backed securities	$ 126,836	$ 105,820
Capital Lease Obligation	3,650	3,765
Long-term Borrowings	141,717	120,560
Overnight Variable Rate Advances from Federal Home Loan Bank collateralized by qualifying mortgages, investment securities, and mortgage-backed securities	92,000	91,500
Federal Funds Purchased	0	3,642
Repurchase Agreements	41,499	42,412
Short-term Borrowings	133,499	137,554
Total Borrowings	275,216	258,114
American Community Bancorp
Business Acquisition [Line Items]
Junior Subordinated Debentures assumed from Business Acquisitions	5,624	5,474
River Valley Bancorp
Business Acquisition [Line Items]
Junior Subordinated Debentures assumed from Business Acquisitions	$ 5,607	$ 5,501