Investment Securities - Available for Sale (Details) $ in Thousands	Jun. 30, 2021 USD ($) security	Dec. 31, 2020 USD ($) security	Jun. 30, 2020 USD ($) security
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	$ 433,692	$ 357,497	$ 369,934
Gross Unrealized Gains	6,166	8,118	9,468
Gross Unrealized Losses	(1,990)	(328)	(624)
Available-for-Sale at Fair Value	437,868	365,287	378,778
Maturities of Debt Securities, at Amortized Cost:
Within One Year	151
From 1 - 5 Years	382,354
From 5 - 10 Years	51,187
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	159
From 1 - 5 Years	386,810
From 5 - 10 Years	50,899
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	198,695	29,926	28,008
12 Months or Longer	800	5,682	58,282
Total	$ 199,495	$ 35,608	$ 86,290
Number of Securities in a Continuous Loss Position | security	28	6	28
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 1,790	$ 74	$ 82
12 Months or Longer	200	254	542
Total	1,990	328	624
Collateral Pledged
Available-For-Sale Securities
Available-For-Sale Securities, Pledged as Collateral, at Fair Value	313,856	244,411	240,747
U.S. Government & Agency Obligations
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	110,001	65,002	5,002
Gross Unrealized Gains	114	184	190
Gross Unrealized Losses	(950)	(74)	0
Available-for-Sale at Fair Value	109,165	65,112	5,192
Maturities of Debt Securities, at Amortized Cost:
Within One Year	0
From 1 - 5 Years	65,001
From 5 - 10 Years	45,000
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	0
From 1 - 5 Years	64,280
From 5 - 10 Years	44,885
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	104,050	29,926	0
12 Months or Longer	0	0	0
Total	$ 104,050	$ 29,926	$ 0
Number of Securities in a Continuous Loss Position | security	14	4	0
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 950	$ 74	$ 0
12 Months or Longer	0	0	0
Total	950	74	0
U.S. Government & Agency Obligations | Agency Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	110,001	65,002	5,002
Available-for-Sale at Fair Value	109,165	65,112	5,192
State and Municipal Obligations
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	400	528	593
Gross Unrealized Gains	0	0	0
Gross Unrealized Losses	0	0	0
Available-for-Sale at Fair Value	400	528	593
Maturities of Debt Securities, at Amortized Cost:
Within One Year	0
From 1 - 5 Years	40
From 5 - 10 Years	360
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	0
From 1 - 5 Years	40
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	322,291	290,967	363,339
Gross Unrealized Gains	6,052	7,934	9,278
Gross Unrealized Losses	(840)	(54)	(424)
Available-for-Sale at Fair Value	327,503	298,847	372,193
Maturities of Debt Securities, at Amortized Cost:
Within One Year	151
From 1 - 5 Years	317,313
From 5 - 10 Years	4,827
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	159
From 1 - 5 Years	322,490
From 5 - 10 Years	4,854
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	94,645	0	28,008
12 Months or Longer	0	4,882	57,482
Total	$ 94,645	$ 4,882	$ 85,490
Number of Securities in a Continuous Loss Position | security	13	1	27
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 840	$ 0	$ 82
12 Months or Longer	0	54	342
Total	840	54	424
Mortgage- Backed Securities | US Government Agencies Debt Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	10,949	12,696	73,546
Available-for-Sale at Fair Value	11,040	12,683	73,193
Mortgage- Backed Securities | US Government-sponsored Enterprises Debt Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	311,342	278,271	289,793
Available-for-Sale at Fair Value	316,463	286,164	299,000
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