Deposits (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Time Deposits [Line Items]
Interest-bearing Domestic Deposit, Brokered	$ 1,149,467	$ 496,407
Time deposits over $250,000	532,573	483,609
Time deposits $250,000 and under	994,197	2,065,733
Brokered Time Deposits [Member]
Time Deposits [Line Items]
Interest-bearing Domestic Deposit, Brokered	195,700	1,200,000
Non-maturity Deposits [Member]
Time Deposits [Line Items]
Interest-bearing Domestic Deposit, Brokered	$ 1,100,000	$ 496,400