Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Assets [Abstract]
Investment Securities Available-for-Sale	$ 351,661	$ 807,732	$ 569,407
Carrying Amount [Member]
Assets [Abstract]
Cash and Cash Equivalents	834,710	383,837	371,439
Investment Securities Available-for-Sale	351,661	807,732	569,407
Investment Securities Held-to-Maturity	496,470	68,933	69,036
Loans & Leases, Net	2,972,967	3,040,730	3,009,454
Accrued Interest Receivable	16,367	20,333	18,083
Liabilities [Abstract]
Deposits	4,412,064	4,060,267	3,782,033
Subordinated Debentures	10,310	10,310	10,310
Accrued Interest Payable	592	1,383	2,183
Estimated Fair Value [Member]
Assets [Abstract]
Cash and Cash Equivalents	834,710	383,837	371,439
Investment Securities Available-for-Sale	351,661	807,732	569,407
Investment Securities Held-to-Maturity	490,185	70,049	70,194
Loans & Leases, Net	2,984,866	3,045,911	3,001,079
Accrued Interest Receivable	16,367	20,333	18,083
Liabilities [Abstract]
Deposits	4,412,534	4,061,240	3,783,961
Subordinated Debentures	6,831	6,888	6,936
Accrued Interest Payable	592	1,383	2,183
Estimated Fair Value [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets [Abstract]
Cash and Cash Equivalents	834,710	383,837	371,439
Investment Securities Available-for-Sale	56,387	15,470	80,691
Investment Securities Held-to-Maturity	0	0	0
Loans & Leases, Net	0	0	0
Accrued Interest Receivable	0	0	0
Liabilities [Abstract]
Deposits	4,010,525	3,638,400	3,250,311
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	295,274	792,262	488,716
Investment Securities Held-to-Maturity	445,236	26,262	28,893
Loans & Leases, Net	0	0	0
Accrued Interest Receivable	16,367	20,333	18,083
Liabilities [Abstract]
Deposits	0	0	0
Subordinated Debentures	6,831	6,888	6,936
Accrued Interest Payable	592	1,383	2,183
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	44,949	43,787	41,301
Loans & Leases, Net	2,984,866	3,045,911	3,001,079
Accrued Interest Receivable	0	0	0
Liabilities [Abstract]
Deposits	402,009	422,840	533,650
Subordinated Debentures	0	0	0
Accrued Interest Payable	$ 0	$ 0	$ 0