Deposits (Schedule of Maturities of Time Certificates of Deposit) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deposits [Abstract]
Due within one year	$ 3,420,207	$ 3,213,010
Due in one to two years	2,024,189	1,251,446
Due in two to three years	114,103	710,836
Due in three to four years	37,743	47,979
Due in four to five years	26,239	37,563
Due after five years	790	7
Total time certificate of deposits	$ 5,623,271	$ 5,260,841