Investment Securities - Available for Sale (Details) $ in Thousands	Mar. 31, 2024 USD ($) security	Dec. 31, 2023 USD ($) security	Mar. 31, 2023 USD ($) security
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	$ 530,328	$ 540,202	$ 623,074
Gross Unrealized Gains	56	300	160
Gross Unrealized Losses	(44,551)	(42,733)	(57,541)
Available-for-Sale at Fair Value	485,833	497,769	565,693
Maturities of Debt Securities, at Amortized Cost:
Within One Year	81,818
From 1 - 5 Years	307,417
From 5 - 10 Years	141,093
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	81,249
From 1 - 5 Years	285,775
From 5 - 10 Years	118,809
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	49,358	0	81,164
12 Months or Longer	390,709	407,960	471,059
Total	$ 440,067	$ 407,960	$ 552,223
Number of Securities in a Continuous Loss Position | security	120	117	176
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 42	$ 0	$ 1,833
12 Months or Longer	44,509	42,733	55,708
Total	44,551	42,733	57,541
Collateral Pledged
Available-For-Sale Securities
Available-For-Sale Securities, Pledged as Collateral, at Fair Value	310,587	242,938	360,153
U.S. Treasuries
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	74,190	73,761	0
Gross Unrealized Gains	4	243	0
Gross Unrealized Losses	(42)	0	0
Available-for-Sale at Fair Value	74,152	74,004	0
Maturities of Debt Securities, at Amortized Cost:
Within One Year	49,263
From 1 - 5 Years	24,927
From 5 - 10 Years	0
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	49,260
From 1 - 5 Years	24,892
From 5 - 10 Years	0
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	49,287	0	0
12 Months or Longer	0	0	0
Total	$ 49,287	$ 0	$ 0
Number of Securities in a Continuous Loss Position | security	2	0	0
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 42	$ 0	$ 0
12 Months or Longer	0	0	0
Total	42	0	0
U.S. Government & Agency Obligations
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	160,000	160,000	190,000
Gross Unrealized Gains	39	51	0
Gross Unrealized Losses	(7,290)	(7,126)	(12,415)
Available-for-Sale at Fair Value	152,749	152,925	177,585
Maturities of Debt Securities, at Amortized Cost:
Within One Year	30,000
From 1 - 5 Years	130,000
From 5 - 10 Years	0
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	29,498
From 1 - 5 Years	123,251
From 5 - 10 Years	0
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	0	0	54,058
12 Months or Longer	137,710	137,874	123,526
Total	$ 137,710	$ 137,874	$ 177,584
Number of Securities in a Continuous Loss Position | security	19	19	25
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 0	$ 0	$ 942
12 Months or Longer	7,290	7,126	11,473
Total	7,290	7,126	12,415
U.S. Government & Agency Obligations | Agency Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	160,000	160,000	190,000
Available-for-Sale at Fair Value	152,749	152,925	177,585
State and Municipal Obligations
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	280	280	320
Gross Unrealized Gains	0	0	0
Gross Unrealized Losses	0	0	0
Available-for-Sale at Fair Value	280	280	320
Maturities of Debt Securities, at Amortized Cost:
Within One Year	0
From 1 - 5 Years	0
From 5 - 10 Years	280
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	0
From 1 - 5 Years	0
From 5 - 10 Years	280
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	280	280	320
Available-for-Sale at Fair Value	280	280	320
Mortgage- Backed Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	294,858	305,161	431,754
Gross Unrealized Gains	13	6	160
Gross Unrealized Losses	(37,154)	(35,407)	(44,926)
Available-for-Sale at Fair Value	257,717	269,760	386,988
Maturities of Debt Securities, at Amortized Cost:
Within One Year	2,555
From 1 - 5 Years	152,490
From 5 - 10 Years	139,813
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	2,491
From 1 - 5 Years	137,632
From 5 - 10 Years	117,594
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	71	0	27,106
12 Months or Longer	252,064	269,286	346,733
Total	$ 252,135	$ 269,286	$ 373,839
Number of Securities in a Continuous Loss Position | security	98	97	150
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 0	$ 0	$ 891
12 Months or Longer	37,154	35,407	44,035
Total	37,154	35,407	44,926
Mortgage- Backed Securities | US Government Agencies Debt Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	7,180	7,291	7,782
Available-for-Sale at Fair Value	6,843	6,864	7,321
Mortgage- Backed Securities | US Government-sponsored Enterprises Debt Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	287,678	297,870	423,972
Available-for-Sale at Fair Value	250,874	262,896	379,667
Corporate and Other Debt Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	1,000		1,000
Gross Unrealized Gains	0		0
Gross Unrealized Losses	(65)		(200)
Available-for-Sale at Fair Value	935		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	935
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	0		0
12 Months or Longer	935		800
Total	$ 935		$ 800
Number of Securities in a Continuous Loss Position | security	1		1
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 0	0	$ 0
12 Months or Longer	65	200	200
Total	65	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
Gross Unrealized Gains		0
Gross Unrealized Losses		(200)
Available-for-Sale at Fair Value	$ 935	800	$ 800
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months		0
12 Months or Longer		800
Total		$ 800
Number of Securities in a Continuous Loss Position | security		1