Investment Securities Schedule of Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Schedule of Held-to-maturity Securities [Line Items]
Due within 1 year	$ 4,949
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value	4,974
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	8,370	$ 2,073
Debt Securities, Held-to-maturity	268,638	337,123
Securities held to maturity, fair value	276,988	$ 338,718
Due after 1 but within 5 years	11,195
Due after 5 but within 10 years	19,760
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value	20,232
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value	11,310
Due after 10 years	7,029
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value	7,077
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Amortized Cost	42,933
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Fair Value	43,593
Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Amortized Cost	225,705
Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Fair Value	233,395
US Government Agencies Residential Mortgage-backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity	44,300
Securities held to maturity, fair value	46,000
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity	181,400
Securities held to maturity, fair value	$ 187,400