Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Assets [Abstract]
Investment Securities Available-for-Sale	$ 481,596	$ 448,263
Investment Securities Held-to-Maturity	55,236	58,408
Carrying Amount [Member]
Assets [Abstract]
Cash and Cash Equivalents	187,149	98,960
Investment Securities Available-for-Sale	481,596	448,263
Investment Securities Held-to-Maturity	54,460	58,109
FHLB Stock	10,342	8,872
Loans & Leases, Net of Deferred Fees & Allowance	2,164,953	2,129,682
Accrued Interest Receivable	10,999	10,047
Liabilities [Abstract]
Deposits	2,723,228	2,581,711
Subordinated Debentures	10,310	10,310
Accrued Interest Payable	1,137	852
Estimated Fair Value [Member]
Assets [Abstract]
Cash and Cash Equivalents	187,149	98,960
Investment Securities Available-for-Sale	481,596	448,263
Investment Securities Held-to-Maturity	55,236	58,408
Loans & Leases, Net of Deferred Fees & Allowance	2,137,987	2,107,060
Accrued Interest Receivable	10,999	10,047
Liabilities [Abstract]
Deposits	2,720,502	2,580,601
Subordinated Debentures	7,428	6,578
Accrued Interest Payable	1,137	852
Estimated Fair Value [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets [Abstract]
Cash and Cash Equivalents	187,149	98,960
Investment Securities Available-for-Sale	29,580	134,628
Investment Securities Held-to-Maturity	0	0
Loans & Leases, Net of Deferred Fees & Allowance	0	0
Accrued Interest Receivable	0	0
Liabilities [Abstract]
Deposits	2,247,831	2,011,418
Subordinated Debentures	0	0
Accrued Interest Payable	0	0
Estimated Fair Value [Member] | Other Observable Inputs (Level 2) [Member]
Assets [Abstract]
Cash and Cash Equivalents	0	0
Investment Securities Available-for-Sale	449,516	313,135
Investment Securities Held-to-Maturity	38,492	40,415
Loans & Leases, Net of Deferred Fees & Allowance	0	0
Accrued Interest Receivable	10,999	10,047
Liabilities [Abstract]
Deposits	472,671	569,183
Subordinated Debentures	7,428	6,578
Accrued Interest Payable	1,137	852
Estimated Fair Value [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets [Abstract]
Cash and Cash Equivalents	0	0
Investment Securities Available-for-Sale	2,500	500
Investment Securities Held-to-Maturity	16,744	17,993
Loans & Leases, Net of Deferred Fees & Allowance	2,137,987	2,107,060
Accrued Interest Receivable	0	0
Liabilities [Abstract]
Deposits	0	0
Subordinated Debentures	0	0
Accrued Interest Payable	$ 0	$ 0