Securities Sold Under Repurchase Agreements - Schedule of Securities Sold Under Repurchase Agreements (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Securities sold under repurchase agreements by collateral pledged
Total securities sold under repurchase agreements	$ 111,711	$ 128,053
Residential Mortgage Pass-Through Securities Issued by FNMA and FHLMC [Member]
Securities sold under repurchase agreements by collateral pledged
Total securities sold under repurchase agreements	104,301	115,357
Other Residential Mortgage-Backed Securities Issued or Guaranteed by FNMA, FHLMC or GNMA [Member]
Securities sold under repurchase agreements by collateral pledged
Total securities sold under repurchase agreements	$ 7,410	$ 12,696