Fair Values - Fair Value by Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents	$ 61,229	$ 84,239	$ 100,272	$ 72,838
Available-for-Sale	298,812	317,535	305,589
Held-To-Maturity Securities, at Amortized Cost	279,400	283,476	330,124
Held-To-Maturity Securities, at Fair Value	280,414	280,338	324,937
Equity Securities	1,850	1,774	1,579
Net Loans	2,214,835	2,176,019	1,973,980
Deposits	2,490,097	2,345,584	2,411,273
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	58,407	54,659	74,957
Federal Home Loan Bank Overnight Advances	74,500	234,000	0
Federal Home Loan Bank Term Advances	35,000	45,000	45,000
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	20,000	20,000	20,000
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents	61,229		100,272
Available-for-Sale	298,812	317,535	305,589
Held-To-Maturity Securities, at Amortized Cost	279,400	283,476	330,124
Equity Securities	1,850	1,774	1,579
Federal Home Loan Bank and Federal Reserve Bank Stock	7,878	15,506	4,780
Net Loans	2,214,835	2,176,019	1,973,980
Accrued Interest Receivable	8,180	7,035	7,662
Deposits	2,490,097	2,345,584	2,411,273
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	58,407	54,659	74,957
Federal Home Loan Bank Overnight Advances	74,500	234,000
Federal Home Loan Bank Term Advances	35,000	45,000	45,000
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	20,000	20,000	20,000
Accrued Interest Payable	737	570	361
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	61,229	84,239	100,272
Available-for-Sale	298,812	317,535	305,589
Held-To-Maturity Securities, at Fair Value	280,414	280,338	324,937
Equity Securities	1,850	1,774	1,579
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value	7,878	15,506	4,780
Net Loans, at Fair Value	2,164,298	2,114,372	1,915,978
Accrued Interest Receivable, Fair Value Disclosure	8,180	7,035	7,692
Deposits, at Fair Value	2,484,479	2,338,410	2,402,122
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, at Fair Value	58,407	54,659	74,957
Federal Home Loan Bank Overnight Advances, Fair Value Disclosure	74,500	234,000
Federal Home Loan Bank Term Advances, Fair Value Disclosure	34,805	44,652	44,484
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	20,000	20,000	20,000
Accrued Interest Payable, Fair Value Disclosure	737	570	361
Quoted Prices In Active Markets for Indentical Assets (Level 1) | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	61,229	84,239	100,272
Available-for-Sale	0	0	0
Held-To-Maturity Securities, at Fair Value	0	0	0
Equity Securities	0		0
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value	0	0	0
Net Loans, at Fair Value	0	0	0
Accrued Interest Receivable, Fair Value Disclosure	0	0	0
Deposits, at Fair Value	0	0	0
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, at Fair Value	0	0	0
Federal Home Loan Bank Overnight Advances, Fair Value Disclosure	0	0
Federal Home Loan Bank Term Advances, Fair Value Disclosure	0	0	0
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	0	0	0
Accrued Interest Payable, Fair Value Disclosure	0	0	0
Significant Other Observable Inputs (Level 2) | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0	0	0
Available-for-Sale	298,812	317,535	305,589
Held-To-Maturity Securities, at Fair Value	280,414	280,338	324,937
Equity Securities	1,850	1,774	1,579
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value	7,878	15,506	4,780
Net Loans, at Fair Value	0	0	0
Accrued Interest Receivable, Fair Value Disclosure	8,180	7,035	7,692
Deposits, at Fair Value	2,484,479	2,338,410	2,402,122
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, at Fair Value	58,407	54,659	74,957
Federal Home Loan Bank Overnight Advances, Fair Value Disclosure	74,500	234,000
Federal Home Loan Bank Term Advances, Fair Value Disclosure	34,805	44,652	44,484
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	20,000	20,000	20,000
Accrued Interest Payable, Fair Value Disclosure	737	570	361
Significant Unobservable Inputs (Level 3) | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0	0	0
Available-for-Sale	0	0	0
Held-To-Maturity Securities, at Fair Value	0	0	0
Equity Securities	0
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value	0	0	0
Net Loans, at Fair Value	2,164,298	2,114,372	1,915,978
Accrued Interest Receivable, Fair Value Disclosure	0	0	0
Deposits, at Fair Value	0	0	0
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, at Fair Value	0	0	0
Federal Home Loan Bank Overnight Advances, Fair Value Disclosure	0	0
Federal Home Loan Bank Term Advances, Fair Value Disclosure	0	0	0
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	0	0	0
Accrued Interest Payable, Fair Value Disclosure	$ 0	$ 0	$ 0