Investment Securities Schedule of Available for Sale Securities (Details) $ in Thousands	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Available-for-Sale Securities
Available-For-Sale Securities, at Amortized Cost	$ 322,491	$ 301,876
Available-for-Sale	317,535	300,200
Gross Unrealized Gains	290	935
Gross Unrealized Losses	5,246	2,611
Maturities of Debt Securities, at Amortized Cost:
Within One Year	43,007
From 1 - 5 Years	151,069
From 5 - 10 Years	106,777
Over 10 Years	21,638
Maturities of Debt Securities, at Fair Value:
Within One Year	42,811
From 1 - 5 Years	147,503
From 5 - 10 Years	105,902
Over 10 Years	21,319
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	107,550	99,776
12 Months or Longer	172,192	121,105
Total	$ 279,742	$ 220,881
Number of Securities in a Continuous Loss Position	97	106
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 841	$ 546
12 Months or Longer	4,405	2,065
Total	5,246	2,611
U.S. Treasury and Agency Obligations
Available-for-Sale Securities
Available-For-Sale Securities, at Amortized Cost	47,071	60,328
Available-for-Sale	46,765	59,894
Gross Unrealized Gains	0	0
Gross Unrealized Losses	306	434
Maturities of Debt Securities, at Amortized Cost:
Within One Year	42,068
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	41,864
From 1 - 5 Years	4,901
From 5 - 10 Years	0
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	0	20,348
12 Months or Longer	46,765	39,546
Total	$ 46,765	$ 59,894
Number of Securities in a Continuous Loss Position	10	14
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 0	$ 172
12 Months or Longer	306	262
Total	306	434
U.S. Treasury and Agency Obligations | US Treasury Securities
Available-for-Sale Securities
Available-For-Sale Securities, at Amortized Cost	0	0
Available-for-Sale	0	0
U.S. Treasury and Agency Obligations | Agency Securities
Available-for-Sale Securities
Available-For-Sale Securities, at Amortized Cost	47,071	60,328
Available-for-Sale	46,765	59,894
State and Municipal Obligations
Available-for-Sale Securities
Available-For-Sale Securities, at Amortized Cost	1,193	10,351
Available-for-Sale	1,195	10,349
Gross Unrealized Gains	2	9
Gross Unrealized Losses	0	11
Maturities of Debt Securities, at Amortized Cost:
Within One Year	201
From 1 - 5 Years	512
From 5 - 10 Years	0
Over 10 Years	480
Maturities of Debt Securities, at Fair Value:
Within One Year	204
From 1 - 5 Years	511
From 5 - 10 Years	0
Over 10 Years	480
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	0	8,498
12 Months or Longer	0	0
Total	$ 0	$ 8,498
Number of Securities in a Continuous Loss Position	0	36
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 0	$ 11
12 Months or Longer	0	0
Total	0	11
Collateralized Mortgage Backed Securities
Available-for-Sale Securities
Available-For-Sale Securities, at Amortized Cost	273,227	229,077
Available-for-Sale	268,775	227,596
Gross Unrealized Gains	288	485
Gross Unrealized Losses	4,740	1,966
Maturities of Debt Securities, at Amortized Cost:
Within One Year	738
From 1 - 5 Years	145,554
From 5 - 10 Years	106,777
Over 10 Years	20,158
Maturities of Debt Securities, at Fair Value:
Within One Year	743
From 1 - 5 Years	142,091
From 5 - 10 Years	105,902
Over 10 Years	20,039
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	107,550	70,930
12 Months or Longer	124,627	80,759
Total	$ 232,177	$ 151,689
Number of Securities in a Continuous Loss Position	86	55
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 841	$ 363
12 Months or Longer	3,899	1,603
Total	4,740	1,966
Collateralized Mortgage Backed Securities | US Government Agencies Debt Securities
Available-for-Sale Securities
Available-For-Sale Securities, at Amortized Cost	72,095	40,832
Available-for-Sale	71,800	40,832
Collateralized Mortgage Backed Securities | US Government-sponsored Enterprises Debt Securities
Available-for-Sale Securities
Available-For-Sale Securities, at Amortized Cost	201,132	188,245
Available-for-Sale	196,975	186,764
Corporate Debt Securities
Available-for-Sale Securities
Available-For-Sale Securities, at Amortized Cost	1,000	1,000
Available-for-Sale	800	800
Gross Unrealized Gains	0	0
Gross Unrealized Losses	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
12 Months or Longer	800	800
Total	$ 800	$ 800
Number of Securities in a Continuous Loss Position	1	1
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 0	$ 0
12 Months or Longer	200	200
Total	200	200
Mututal Funds and Equity Securities
Available-for-Sale Securities
Available-For-Sale Securities, at Amortized Cost		1,120
Available-for-Sale		1,561
Gross Unrealized Gains		441
Gross Unrealized Losses		0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months		0
12 Months or Longer		0
Total		$ 0
Number of Securities in a Continuous Loss Position		0
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months		$ 0
12 Months or Longer		0
Total		0
Collateral Pledged
Available-for-Sale Securities
Available-For-Sale Securities, Pledged as Collateral, at Fair Value	$ 236,163	$ 183,052