Investment Securities - Available for Sale (Details) $ in Thousands	Mar. 31, 2022 USD ($) security	Dec. 31, 2021 USD ($) security	Mar. 31, 2021 USD ($) security
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	$ 613,209	$ 560,142	$ 461,420
Gross Unrealized Gains	232	3,680	6,414
Gross Unrealized Losses	(31,013)	(4,506)	(3,745)
Available-for-Sale at Fair Value	582,428	559,316	464,089
Maturities of Debt Securities, at Amortized Cost:
Within One Year	5,106
From 1 - 5 Years	384,495
From 5 - 10 Years	223,608
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	5,129
From 1 - 5 Years	369,337
From 5 - 10 Years	207,962
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	402,206	337,380	224,011
12 Months or Longer	159,551	30,014	800
Total	$ 561,757	$ 367,394	$ 224,811
Number of Securities in a Continuous Loss Position | security	148	54	31
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 18,431	$ 3,520	$ 3,545
12 Months or Longer	12,582	986	200
Total	31,013	4,506	3,745
Collateral Pledged
Available-For-Sale Securities
Available-For-Sale Securities, Pledged as Collateral, at Fair Value	397,138	298,106	352,214
U.S. Government & Agency Obligations
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	140,000	110,000	110,001
Gross Unrealized Gains	21	63	138
Gross Unrealized Losses	(7,277)	(1,698)	(1,769)
Available-for-Sale at Fair Value	132,744	108,365	108,370
Maturities of Debt Securities, at Amortized Cost:
Within One Year	5,000
From 1 - 5 Years	135,000
From 5 - 10 Years	0
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	5,021
From 1 - 5 Years	127,723
From 5 - 10 Years	0
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	43,518	74,088	103,231
12 Months or Longer	84,205	29,214	0
Total	$ 127,723	$ 103,302	$ 103,231
Number of Securities in a Continuous Loss Position | security	18	14	14
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 1,482	$ 912	$ 1,769
12 Months or Longer	5,795	786	0
Total	7,277	1,698	1,769
U.S. Government & Agency Obligations | Agency Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	140,000	110,000	110,001
Available-for-Sale at Fair Value	132,744	108,365	108,370
State and Municipal Obligations
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	380	400	508
Gross Unrealized Gains	0	0	0
Gross Unrealized Losses	0	0	0
Available-for-Sale at Fair Value	380	400	508
Maturities of Debt Securities, at Amortized Cost:
Within One Year	20
From 1 - 5 Years	0
From 5 - 10 Years	360
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	20
From 1 - 5 Years	0
From 5 - 10 Years	360
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	0	0	0
12 Months or Longer	0	0	0
Total	$ 0	$ 0	$ 0
Number of Securities in a Continuous Loss Position | security	0	0	0
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 0	$ 0	$ 0
12 Months or Longer	0	0	0
Total	0	0	0
Mortgage- Backed Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	471,829	448,742	349,911
Gross Unrealized Gains	211	3,617	6,276
Gross Unrealized Losses	(23,536)	(2,608)	(1,776)
Available-for-Sale at Fair Value	448,504	449,751	354,411
Maturities of Debt Securities, at Amortized Cost:
Within One Year	86
From 1 - 5 Years	249,495
From 5 - 10 Years	222,248
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	88
From 1 - 5 Years	241,614
From 5 - 10 Years	206,802
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	358,688	263,292	120,780
12 Months or Longer	74,546	0	0
Total	$ 433,234	$ 263,292	$ 120,780
Number of Securities in a Continuous Loss Position | security	129	39	16
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 16,949	$ 2,608	$ 1,776
12 Months or Longer	6,587	0	0
Total	23,536	2,608	1,776
Mortgage- Backed Securities | US Government Agencies Debt Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	8,853	9,386	11,582
Available-for-Sale at Fair Value	8,667	9,371	11,658
Mortgage- Backed Securities | US Government-sponsored Enterprises Debt Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	462,976	439,356	338,329
Available-for-Sale at Fair Value	439,837	440,380	342,753
Corporate and Other Debt Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	1,000	1,000	1,000
Gross Unrealized Gains	0	0	0
Gross Unrealized Losses	(200)	(200)	(200)
Available-for-Sale at Fair Value	800	800	800
Maturities of Debt Securities, at Amortized Cost:
Within One Year	0
From 1 - 5 Years	0
From 5 - 10 Years	1,000
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	0
From 1 - 5 Years	0
From 5 - 10 Years	800
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	0	0	0
12 Months or Longer	800	800	800
Total	$ 800	$ 800	$ 800
Number of Securities in a Continuous Loss Position | security	1	1	1
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 0	$ 0	$ 0
12 Months or Longer	200	200	200
Total	$ 200	$ 200	$ 200