Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Assets [Abstract]
Investment Securities Available-for-Sale	$ 560,973	$ 807,732	$ 532,246
Carrying Amount [Member]
Assets [Abstract]
Cash and Cash Equivalents	493,407	383,837	282,960
Investment Securities Available-for-Sale	560,973	807,732	532,246
Investment Securities Held-to-Maturity	385,054	68,933	58,701
Loans & Leases, Net	3,050,836	3,040,730	2,615,285
Accrued Interest Receivable	15,220	20,333	12,541
Liabilities [Abstract]
Deposits	4,241,214	4,060,267	3,255,273
Subordinated Debentures	10,310	10,310	10,310
Accrued Interest Payable	757	1,383	2,430
Estimated Fair Value [Member]
Assets [Abstract]
Cash and Cash Equivalents	493,407	383,837	282,960
Investment Securities Available-for-Sale	560,973	807,732	532,246
Investment Securities Held-to-Maturity	374,827	70,049	59,503
Loans & Leases, Net	3,061,994	3,045,911	2,605,120
Accrued Interest Receivable	15,220	20,333	12,541
Liabilities [Abstract]
Deposits	4,241,918	4,061,240	3,257,538
Subordinated Debentures	6,870	6,888	7,415
Accrued Interest Payable	757	1,383	2,430
Estimated Fair Value [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets [Abstract]
Cash and Cash Equivalents	493,407	383,837	282,960
Investment Securities Available-for-Sale	15,568	15,470	20,606
Investment Securities Held-to-Maturity	0	0	0
Loans & Leases, Net	0	0	0
Accrued Interest Receivable	0	0	0
Liabilities [Abstract]
Deposits	3,824,638	3,638,400	2,733,525
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	545,405	792,262	511,640
Investment Securities Held-to-Maturity	329,007	26,262	29,296
Loans & Leases, Net	0	0	0
Accrued Interest Receivable	15,220	20,333	12,541
Liabilities [Abstract]
Deposits	0	0	0
Subordinated Debentures	6,870	6,888	7,415
Accrued Interest Payable	757	1,383	2,430
Estimated Fair Value [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets [Abstract]
Cash and Cash Equivalents	0	0	0
Investment Securities Available-for-Sale	0	0	0
Investment Securities Held-to-Maturity	45,820	43,787	30,207
Loans & Leases, Net	3,061,994	3,045,911	2,605,120
Accrued Interest Receivable	0	0	0
Liabilities [Abstract]
Deposits	417,280	422,840	524,013
Subordinated Debentures	0	0	0
Accrued Interest Payable	$ 0	$ 0	$ 0