Investment Securities Schedule of Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Schedule of Held-to-maturity Securities [Line Items]
Due within 1 year	$ 1,012
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value	1,018
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	9,888	$ 2,073
Debt Securities, Held-to-maturity	297,986	337,123
Securities held to maturity, fair value	307,874	$ 338,718
Due after 1 but within 5 years	14,227
Due after 5 but within 10 years	24,700
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value	25,199
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value	14,404
Due after 10 years	0
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value	0
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Amortized Cost	39,939
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Fair Value	40,621
Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Amortized Cost	258,047
Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Fair Value	267,253
US Government Agencies Residential Mortgage-backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity	49,800
Securities held to maturity, fair value	51,600
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity	208,200
Securities held to maturity, fair value	$ 215,600