Investment Securities - Available-for-Sale (Details) $ in Thousands	Sep. 30, 2024 USD ($) security	Dec. 31, 2023 USD ($) security	Sep. 30, 2023 USD ($) security
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	$ 468,043	$ 540,202	$ 589,603
Gross Unrealized Gains	320	300	1
Gross Unrealized Losses	(31,296)	(42,733)	(70,364)
Available-for-Sale at Fair Value	437,067	497,769	519,240
Maturities of Debt Securities, at Amortized Cost:
Within One Year	86,858
From 1 - 5 Years	281,660
From 5 - 10 Years	99,525
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	86,169
From 1 - 5 Years	265,081
From 5 - 10 Years	85,817
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	0	0	26,176
12 Months or Longer	365,469	407,960	492,496
Total	$ 365,469	$ 407,960	$ 518,672
Number of Securities in a Continuous Loss Position | security	109	117	180
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 0	$ 0	$ 403
12 Months or Longer	31,296	42,733	69,961
Total	31,296	42,733	70,364
Collateral Pledged
Available-For-Sale Securities
Available-For-Sale Securities, Pledged as Collateral, at Fair Value	332,430	242,938	390,923
U.S. Treasuries
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	49,795	73,761	0
Gross Unrealized Gains	229	243	0
Gross Unrealized Losses	0	0	0
Available-for-Sale at Fair Value	50,024	74,004	0
Maturities of Debt Securities, at Amortized Cost:
Within One Year	24,846
From 1 - 5 Years	24,949
From 5 - 10 Years	0
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	24,865
From 1 - 5 Years	25,159
From 5 - 10 Years	0
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
U.S. Government & Agency Obligations
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	145,000	160,000	190,000
Gross Unrealized Gains	58	51	0
Gross Unrealized Losses	(3,708)	(7,126)	(13,579)
Available-for-Sale at Fair Value	141,350	152,925	176,421
Maturities of Debt Securities, at Amortized Cost:
Within One Year	60,000
From 1 - 5 Years	85,000
From 5 - 10 Years	0
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	59,319
From 1 - 5 Years	82,031
From 5 - 10 Years	0
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	0	0	14,914
12 Months or Longer	126,292	137,874	161,506
Total	$ 126,292	$ 137,874	$ 176,420
Number of Securities in a Continuous Loss Position | security	17	19	25
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 0	$ 0	$ 86
12 Months or Longer	3,708	7,126	13,493
Total	3,708	7,126	13,579
U.S. Government & Agency Obligations | Agency Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	145,000	160,000	190,000
Available-for-Sale at Fair Value	141,350	152,925	176,421
State and Municipal Obligations
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	240	280	280
Gross Unrealized Gains	0	0	0
Gross Unrealized Losses	0	0	0
Available-for-Sale at Fair Value	240	280	280
Maturities of Debt Securities, at Amortized Cost:
Within One Year	0
From 1 - 5 Years	0
From 5 - 10 Years	240
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	0
From 1 - 5 Years	0
From 5 - 10 Years	240
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
State and Municipal Obligations | Municipal Bonds
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	240	280	280
Available-for-Sale at Fair Value	240	280	280
Mortgage- Backed Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	272,008	305,161	398,323
Gross Unrealized Gains	33	6	1
Gross Unrealized Losses	(27,545)	(35,407)	(56,585)
Available-for-Sale at Fair Value	244,496	269,760	341,739
Maturities of Debt Securities, at Amortized Cost:
Within One Year	2,012
From 1 - 5 Years	170,711
From 5 - 10 Years	99,285
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	1,985
From 1 - 5 Years	156,934
From 5 - 10 Years	85,577
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	0	0	11,262
12 Months or Longer	238,220	269,286	330,190
Total	$ 238,220	$ 269,286	$ 341,452
Number of Securities in a Continuous Loss Position | security	91	97	154
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 0	$ 0	$ 317
12 Months or Longer	27,545	35,407	56,268
Total	27,545	35,407	56,585
Mortgage- Backed Securities | US Government Agencies Debt Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	6,908	7,291	7,416
Available-for-Sale at Fair Value	6,690	6,864	6,885
Mortgage- Backed Securities | US Government-sponsored Enterprises Debt Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	265,100	297,870	390,907
Available-for-Sale at Fair Value	237,806	262,896	334,854
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	(43)	(200)	(200)
Available-for-Sale at Fair Value	957	800	800
Maturities of Debt Securities, at Amortized Cost:
Within One Year	0
From 1 - 5 Years	1,000
From 5 - 10 Years	0
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	0
From 1 - 5 Years	957
From 5 - 10 Years	0
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	0	0	0
12 Months or Longer	957	800	800
Total	$ 957	$ 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	43	200	200
Total	43	200	200
Corporate and Other Debt Securities | Corporate Trust Preferred Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	1,000	1,000	1,000
Available-for-Sale at Fair Value	$ 957	$ 800	$ 800