Fair Values - Fair Value by Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Carrying Value
Cash and Cash Equivalents	$ 452,207	$ 380,991	$ 138,529	$ 70,221
Available-for-Sale at Fair Value	464,089	365,287	378,186
Securities Held-to-Maturity	214,561	218,405	238,520
Equity Securities	1,796	1,636	1,689
Total Loans	2,612,403	2,565,798	2,390,556
Deposits	3,453,588	3,234,726	2,811,005
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	6,795	17,486	57,909
Federal Home Loan Bank Term Advances	45,000	45,000	50,000
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	20,000	20,000	20,000
Fair Value
Available-for-Sale	464,089	365,287	378,186
Securities Held-to-Maturity	221,360	226,576	242,804
Equity Securities	1,796	1,636	1,689
Carrying Amount
Carrying Value
Cash and Cash Equivalents	452,207	380,991	138,529
Available-for-Sale at Fair Value	464,089	365,287	378,186
Securities Held-to-Maturity	214,561	218,405	238,520
Equity Securities	1,796	1,636	1,689
Federal Home Loan Bank and Federal Reserve Bank Stock	5,360	5,349	5,379
Total Loans	2,612,403	2,565,798	2,390,556
Accrued Interest Receivable	8,258	7,495	7,856
Derivatives, included in other assets	2,298	5,080	5,191
Deposits	3,453,588	3,234,726	2,811,005
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	6,795	17,486	57,909
Federal Home Loan Bank Overnight Advances		45,000
Federal Home Loan Bank Term Advances	45,000		50,000
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	20,000	20,000	20,000
Accrued Interest Payable	237	326	1,392
Derivatives, included in other liabilities	2,298	5,080	5,191
Fair Value
Available-for-Sale	464,089	365,287	378,186
Equity Securities	1,796	1,636	1,689
Derivatives, included in other assets	2,298	5,080	5,191
Derivatives, included in other liabilities	2,298	5,080	5,191
Fair Value
Carrying Value
Available-for-Sale at Fair Value	464,089	365,287	378,186
Equity Securities	1,796	1,636	1,689
Derivatives, included in other assets	2,298	5,080	5,191
Derivatives, included in other liabilities	2,298	5,080	5,191
Fair Value
Cash and Cash Equivalents	452,207	380,991	138,529
Available-for-Sale	464,089	365,287	378,186
Securities Held-to-Maturity	221,360	226,576	242,804
Equity Securities	1,796	1,636	1,689
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value	5,360	5,349	5,379
Net Loans, at Fair Value	2,603,225	2,558,903	2,368,033
Accrued Interest Receivable	8,258	7,495	7,856
Derivatives, included in other assets	2,298	5,080	5,191
Deposits	3,452,595	3,234,387	2,811,668
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	6,795	17,486	57,909
Federal Home Loan Bank Overnight Advances		46,474
Federal Home Loan Bank Term Advances	46,176		51,194
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	20,000	20,000	20,000
Accrued Interest Payable	237	326	1,392
Derivatives, included in other liabilities	2,298	5,080	5,191
Quoted Prices In Active Markets for Indentical Assets (Level 1) | Fair Value
Carrying Value
Available-for-Sale at Fair Value	0	0	0
Equity Securities	0	0	0
Derivatives, included in other assets		0	0
Derivatives, included in other liabilities	0	0	0
Fair Value
Cash and Cash Equivalents	452,207	380,991	138,529
Available-for-Sale	0	0	0
Securities Held-to-Maturity	0	0	0
Equity Securities	0	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	0	0	0
Derivatives, included in other assets		0	0
Deposits	0	0	0
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	0	0	0
Federal Home Loan Bank Overnight Advances		0
Federal Home Loan Bank Term Advances	0		0
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	0	0	0
Accrued Interest Payable	0	0	0
Derivatives, included in other liabilities	0	0	0
Significant Other Observable Inputs (Level 2) | Fair Value
Carrying Value
Available-for-Sale at Fair Value	464,089	365,287	378,186
Equity Securities	1,796	1,636	1,689
Derivatives, included in other assets	2,298	5,080	5,191
Derivatives, included in other liabilities	2,298	5,080	5,191
Fair Value
Cash and Cash Equivalents	0	0	0
Available-for-Sale	464,089	365,287	378,186
Securities Held-to-Maturity	221,360	226,576	242,804
Equity Securities	1,796	1,636	1,689
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value	5,360	5,349	5,379
Net Loans, at Fair Value	0	0	0
Accrued Interest Receivable	8,258	7,495	7,856
Derivatives, included in other assets	2,298	5,080	5,191
Deposits	3,452,595	3,234,387	2,811,668
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	6,795	17,486	57,909
Federal Home Loan Bank Overnight Advances		46,474
Federal Home Loan Bank Term Advances	46,176		51,194
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	20,000	20,000	20,000
Accrued Interest Payable	237	326	1,392
Derivatives, included in other liabilities	2,298	5,080	5,191
Significant Unobservable Inputs (Level 3) | Fair Value
Carrying Value
Available-for-Sale at Fair Value	0	0	0
Equity Securities	0
Derivatives, included in other assets		0	0
Derivatives, included in other liabilities	0	0	0
Fair Value
Cash and Cash Equivalents	0	0	0
Available-for-Sale	0	0	0
Securities Held-to-Maturity	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	2,603,225	2,558,903	2,368,033
Accrued Interest Receivable	0	0	0
Derivatives, included in other assets		0	0
Deposits	0	0	0
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	0	0	0
Federal Home Loan Bank Overnight Advances		0
Federal Home Loan Bank Term Advances	0		0
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	0	0	0
Accrued Interest Payable	0	0	0
Derivatives, included in other liabilities	$ 0	$ 0	$ 0