Investment Securities Available for Sale (Details) $ in Thousands	Jun. 30, 2019 USD ($) security	Dec. 31, 2018 USD ($) security	Jun. 30, 2018 USD ($) security
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	$ 285,706	$ 322,491	$ 331,689
Available-for-Sale	285,878	317,535	325,387
Gross Unrealized Gains	1,326	290	338
Gross Unrealized Losses	1,154	5,246	6,640
Maturities of Debt Securities, at Amortized Cost:
Within One Year	12,996
From 1 - 5 Years	171,154
From 5 - 10 Years	75,603
Over 10 Years	25,953
Maturities of Debt Securities, at Fair Value:
Within One Year	12,987
From 1 - 5 Years	171,510
From 5 - 10 Years	75,538
Over 10 Years	25,843
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	24,983	107,550	163,280
12 Months or Longer	143,483	172,192	115,406
Total	$ 168,466	$ 279,742	$ 278,686
Number of Securities in a Continuous Loss Position | security	64	97	100
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 234	$ 841	$ 2,706
12 Months or Longer	920	4,405	3,934
Total	1,154	5,246	6,640
Collateral Pledged
Available-For-Sale Securities
Available-For-Sale Securities, Pledged as Collateral	246,202	236,163	282,481
U.S. Government & Agency Obligations
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	17,506	47,071	60,199
Available-for-Sale	17,524	46,765	59,615
Gross Unrealized Gains	31	0	0
Gross Unrealized Losses	13	306	584
Maturities of Debt Securities, at Amortized Cost:
Within One Year	12,503
From 1 - 5 Years	5,003
From 5 - 10 Years	0
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	12,490
From 1 - 5 Years	5,034
From 5 - 10 Years	0
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	35	0	17,218
12 Months or Longer	12,454	46,765	42,397
Total	$ 12,489	$ 46,765	$ 59,615
Number of Securities in a Continuous Loss Position | security	2	10	14
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 0	$ 0	$ 297
12 Months or Longer	13	306	287
Total	13	306	584
U.S. Government & Agency Obligations | US Treasury Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	0	0	0
Available-for-Sale	0	0	0
U.S. Government & Agency Obligations | Agency Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	17,506	47,071	60,199
Available-for-Sale	17,524	46,765	59,615
State and Municipal Obligations
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	965	1,193	3,377
Available-for-Sale	967	1,195	3,383
Gross Unrealized Gains	2	2	6
Gross Unrealized Losses	0	0	0
Maturities of Debt Securities, at Amortized Cost:
Within One Year	226
From 1 - 5 Years	299
From 5 - 10 Years	0
Over 10 Years	440
Maturities of Debt Securities, at Fair Value:
Within One Year	229
From 1 - 5 Years	298
From 5 - 10 Years	0
Over 10 Years	440
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	0	0	1,797
12 Months or Longer	0	0	0
Total	$ 0	$ 0	$ 1,797
Number of Securities in a Continuous Loss Position | security	0	0	6
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	266,235	273,227	267,113
Available-for-Sale	266,587	268,775	261,589
Gross Unrealized Gains	1,293	288	332
Gross Unrealized Losses	941	4,740	5,856
Maturities of Debt Securities, at Amortized Cost:
Within One Year	267
From 1 - 5 Years	165,852
From 5 - 10 Years	75,603
Over 10 Years	24,513
Maturities of Debt Securities, at Fair Value:
Within One Year	268
From 1 - 5 Years	166,178
From 5 - 10 Years	75,538
Over 10 Years	24,603
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	24,948	107,550	144,265
12 Months or Longer	130,229	124,627	72,209
Total	$ 155,177	$ 232,177	$ 216,474
Number of Securities in a Continuous Loss Position | security	61	86	79
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 234	$ 841	$ 2,409
12 Months or Longer	707	3,899	3,447
Total	941	4,740	5,856
Mortgage- Backed Securities | US Government Agencies Debt Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	67,760	72,095	68,030
Available-for-Sale	67,613	71,800	68,083
Mortgage- Backed Securities | US Government-sponsored Enterprises Debt Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	198,475	201,132	199,083
Available-for-Sale	198,974	196,975	193,506
Corporate and Other Debt Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	1,000	1,000	1,000
Available-for-Sale	800	800	800
Gross Unrealized Gains	0	0	0
Gross Unrealized Losses	200	200	200
Maturities of Debt Securities, at Amortized Cost:
Within One Year	0
From 1 - 5 Years	0
From 5 - 10 Years	0
Over 10 Years	1,000
Maturities of Debt Securities, at Fair Value:
Within One Year	0
From 1 - 5 Years	0
From 5 - 10 Years	0
Over 10 Years	800
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