Investment Securities Schedule of Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Schedule of Held-to-maturity Securities [Line Items]
Due within 1 year	$ 2,887
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value	2,904
Due after 1 but within 5 years	5,117
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value	5,179
Due after 5 but within 10 years	45,774
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value	44,717
Due after 10 years	3,801
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value	3,774
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Amortized Cost	57,579
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Fair Value	56,574
Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Amortized Cost	350,254
Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Fair Value	351,544
Debt Securities, Held-to-maturity	407,833	$ 361,844
Securities held to maturity, fair value	408,118	$ 369,851
US Government Agencies Residential Mortgage-backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity	61,200
Securities held to maturity, fair value	61,800
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity	289,100
Securities held to maturity, fair value	$ 289,800