Investment Securities Schedule of Held to Maturity Securities (Details) $ in Thousands	Dec. 31, 2019 USD ($) position	Dec. 31, 2018 USD ($) position
Schedule of Held-to-maturity Securities [Line Items]
Held-To-Maturity Securities, at Amortized Cost	$ 245,065	$ 283,476
Held-To-Maturity Securities, at Fair Value		280,338
Gross Unrealized Gains	4,647	486
Gross Unrealized Losses	94	3,624
Held-To-Maturity Securities, Pledged as Collateral, at Fair Value	237,969	266,341
Maturities of Debt Securities, at Amortized Cost:
Within One Year	20,775
From 1 - 5 Years	148,440
From 5 - 10 Years	74,259
Over 10 Years	1,591
Maturities of Debt Securities, at Fair Value:
Within One Year	20,862
From 1 - 5 Years	150,891
From 5 - 10 Years	76,242
Over 10 Years	1,623
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	1,438	65,402
12 Months or Longer	1,994	124,617
Total	$ 3,432	$ 190,019
Number of Securities in a Continuous Loss Position | position	10	458
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 85	$ 618
12 Months or Longer	9	3,006
Total	94	3,624
State and Municipal Obligations
Schedule of Held-to-maturity Securities [Line Items]
Held-To-Maturity Securities, at Amortized Cost	208,243	235,782
Held-To-Maturity Securities, at Fair Value	212,319	233,359
Gross Unrealized Gains	4,170	486
Gross Unrealized Losses	94	2,909
Maturities of Debt Securities, at Amortized Cost:
Within One Year	17,243
From 1 - 5 Years	115,150
From 5 - 10 Years	74,259
Over 10 Years	1,591
Maturities of Debt Securities, at Fair Value:
Within One Year	17,276
From 1 - 5 Years	117,178
From 5 - 10 Years	76,242
Over 10 Years	1,623
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	1,438	32,093
12 Months or Longer	1,994	110,947
Total	$ 3,432	$ 143,040
Number of Securities in a Continuous Loss Position | position	10	411
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 85	$ 162
12 Months or Longer	9	2,747
Total	94	2,909
Collateralized Mortgage Backed Securities
Schedule of Held-to-maturity Securities [Line Items]
Held-To-Maturity Securities, at Amortized Cost	36,822	47,694
Held-To-Maturity Securities, at Fair Value	37,299	46,979
Gross Unrealized Gains	477	0
Gross Unrealized Losses	0	715
Maturities of Debt Securities, at Amortized Cost:
Within One Year	3,532
From 1 - 5 Years	33,290
From 5 - 10 Years	0
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	3,586
From 1 - 5 Years	33,713
From 5 - 10 Years	0
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	0	33,309
12 Months or Longer	0	13,670
Total	$ 0	$ 46,979
Number of Securities in a Continuous Loss Position | position	0	47
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 0	$ 456
12 Months or Longer	0	259
Total	0	715
Agency Securities | Collateralized Mortgage Backed Securities
Schedule of Held-to-maturity Securities [Line Items]
Held-To-Maturity Securities, at Amortized Cost	1,703	2,180
Agency Securities | Collateralized Mortgage Backed Securities | Fair Value, Measurements, Recurring
Schedule of Held-to-maturity Securities [Line Items]
Held-To-Maturity Securities, at Fair Value	1,720	2,143
US Government-sponsored Enterprises Debt Securities | Collateralized Mortgage Backed Securities
Schedule of Held-to-maturity Securities [Line Items]
Held-To-Maturity Securities, at Amortized Cost	35,119	45,514
US Government-sponsored Enterprises Debt Securities | Collateralized Mortgage Backed Securities | Fair Value, Measurements, Recurring
Schedule of Held-to-maturity Securities [Line Items]
Held-To-Maturity Securities, at Fair Value	$ 35,579	$ 44,836