Deposits - Schedule of Deposit Maturities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Deposits [Abstract]
One year or less	$ 1,572,328	$ 1,293,613
After one year to two years	478,820	548,995
After two years to three years	61,513	142,458
After three years to four years	27,502	11,362
After four years	43,879	16,717
Total term certificate accounts	$ 2,184,042	$ 2,013,145