Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Assets [Abstract]
Investment Securities Available-for-Sale	$ 450,174	$ 481,596	$ 461,867
Investment Securities Held-to-Maturity	52,358	55,236	57,127
Carrying Amount [Member]
Assets [Abstract]
Cash and Cash Equivalents	106,899	187,149	147,191
Investment Securities Available-for-Sale	450,174	481,596	461,867
Investment Securities Held-to-Maturity	52,210	54,460	56,381
FHLB Stock	10,877	10,342	10,342
Loans & Leases, Net of Deferred Fees & Allowance	2,293,311	2,164,953	2,155,018
Accrued Interest Receivable	11,548	10,999	9,739
Liabilities [Abstract]
Deposits	2,697,273	2,723,228	2,661,878
Subordinated Debentures	10,310	10,310	10,310
Accrued Interest Payable	827	1,137	1,014
Estimated Fair Value [Member]
Assets [Abstract]
Cash and Cash Equivalents	106,899	187,149	147,191
Investment Securities Available-for-Sale	450,174	481,596	461,867
Investment Securities Held-to-Maturity	52,358	55,236	57,127
Loans & Leases, Net of Deferred Fees & Allowance	2,253,733	2,137,987	2,138,109
Accrued Interest Receivable	11,548	10,999	9,739
Liabilities [Abstract]
Deposits	2,693,193	2,720,502	2,659,949
Subordinated Debentures	7,639	7,428	6,567
Accrued Interest Payable	827	1,137	1,014
Estimated Fair Value [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets [Abstract]
Cash and Cash Equivalents	106,899	187,149	147,191
Investment Securities Available-for-Sale	139,476	144,364	134,620
Investment Securities Held-to-Maturity	0	0	0
Loans & Leases, Net of Deferred Fees & Allowance	0	0	0
Accrued Interest Receivable	0	0	0
Liabilities [Abstract]
Deposits	2,231,153	2,247,831	2,065,151
Subordinated Debentures	0	0	0
Accrued Interest Payable	0	0	0
Estimated Fair Value [Member] | Other Observable Inputs (Level 2) [Member]
Assets [Abstract]
Cash and Cash Equivalents	0	0	0
Investment Securities Available-for-Sale	308,198	334,732	325,328
Investment Securities Held-to-Maturity	36,693	38,492	40,071
Loans & Leases, Net of Deferred Fees & Allowance	0	0	0
Accrued Interest Receivable	11,548	10,999	9,739
Liabilities [Abstract]
Deposits	462,040	472,671	594,798
Subordinated Debentures	7,639	7,428	6,567
Accrued Interest Payable	827	1,137	1,014
Estimated Fair Value [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets [Abstract]
Cash and Cash Equivalents	0	0	0
Investment Securities Available-for-Sale	2,500	2,500	1,919
Investment Securities Held-to-Maturity	15,665	16,744	17,056
Loans & Leases, Net of Deferred Fees & Allowance	2,253,733	2,137,987	2,138,109
Accrued Interest Receivable	0	0	0
Liabilities [Abstract]
Deposits	0	0	0
Subordinated Debentures	0	0	0
Accrued Interest Payable	$ 0	$ 0	$ 0