Investment Securities - Available for Sale (Details) $ in Thousands	Jun. 30, 2020 USD ($) security	Dec. 31, 2019 USD ($) security	Jun. 30, 2019 USD ($) security
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	$ 369,934	$ 356,710	$ 285,706
Gross Unrealized Gains	9,468	1,904	1,326
Gross Unrealized Losses	(624)	(1,280)	(1,154)
Available-for-Sale at Fair Value	378,778	357,334	285,878
Maturities of Debt Securities, at Amortized Cost:
Within One Year	10,845
From 1 - 5 Years	332,098
From 5 - 10 Years	26,991
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	11,147
From 1 - 5 Years	340,989
From 5 - 10 Years	26,642
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	28,008	52,491	24,983
12 Months or Longer	58,282	97,964	143,483
Total	$ 86,290	$ 150,455	$ 168,466
Number of Securities in a Continuous Loss Position | security	28	55	64
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 82	$ 317	$ 234
12 Months or Longer	542	963	920
Total	624	1,280	1,154
Collateral Pledged
Available-For-Sale Securities
Available-For-Sale Securities, Pledged as Collateral, at Fair Value	240,747	164,426	246,202
U.S. Government & Agency Obligations
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	5,002	5,002	17,506
Gross Unrealized Gains	190	52	31
Gross Unrealized Losses	0	0	(13)
Available-for-Sale at Fair Value	5,192	5,054	17,524
Maturities of Debt Securities, at Amortized Cost:
Within One Year	0
From 1 - 5 Years	5,002
From 5 - 10 Years	0
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	0
From 1 - 5 Years	5,192
From 5 - 10 Years	0
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	0	0	35
12 Months or Longer	0	0	12,454
Total	$ 0	$ 0	$ 12,489
Number of Securities in a Continuous Loss Position | security	0	0	2
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 0	$ 0	$ 0
12 Months or Longer	0	0	13
Total	0	0	13
U.S. Government & Agency Obligations | Agency Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	5,002	5,002	17,506
Available-for-Sale at Fair Value	5,192	5,054	17,524
State and Municipal Obligations
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	593	764	965
Gross Unrealized Gains	0	0	2
Gross Unrealized Losses	0	0	0
Available-for-Sale at Fair Value	593	764	967
Maturities of Debt Securities, at Amortized Cost:
Within One Year	68
From 1 - 5 Years	125
From 5 - 10 Years	400
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	68
From 1 - 5 Years	125
From 5 - 10 Years	400
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	363,339	349,944	266,235
Gross Unrealized Gains	9,278	1,852	1,293
Gross Unrealized Losses	(424)	(1,080)	(941)
Available-for-Sale at Fair Value	372,193	350,716	266,587
Maturities of Debt Securities, at Amortized Cost:
Within One Year	10,777
From 1 - 5 Years	326,971
From 5 - 10 Years	25,591
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	11,079
From 1 - 5 Years	335,672
From 5 - 10 Years	25,442
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	28,008	52,491	24,948
12 Months or Longer	57,482	97,164	130,229
Total	$ 85,490	$ 149,655	$ 155,177
Number of Securities in a Continuous Loss Position | security	27	54	61
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 82	$ 317	$ 234
12 Months or Longer	342	763	707
Total	424	1,080	941
Mortgage- Backed Securities | US Government Agencies Debt Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	73,546	61,102	67,760
Available-for-Sale at Fair Value	73,193	60,616	67,613
Mortgage- Backed Securities | US Government-sponsored Enterprises Debt Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	289,793	288,842	198,475
Available-for-Sale at Fair Value	299,000	290,100	198,974
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