Deposits (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Time Deposits [Line Items]
Interest-bearing Domestic Deposit, Brokered	$ 496,407	$ 518,192
Time deposits over $250,000	483,609	412,185
Time deposits $250,000 and under	2,065,733	1,593,453
Brokered Time Deposits [Member]
Time Deposits [Line Items]
Interest-bearing Domestic Deposit, Brokered	1,200,000	729,400
Non-maturity Deposits [Member]
Time Deposits [Line Items]
Interest-bearing Domestic Deposit, Brokered	$ 496,400	$ 518,200