Deposits (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Banking and Thrift, Interest [Abstract]
Checking, non-interest bearing	$ 507,236	$ 382,259
Checking, interest bearing	806,638	628,579
Savings accounts	1,880,252	1,663,673
Certificates of deposit	401,896	427,816
Total deposits	$ 3,596,022	$ 3,102,327
Percentage Change, Checking, non-interest bearing	32.70%
Percentage Change, Checking, interest bearing	28.30%
Percentage Change, Savings accounts	13.00%
Percentage Change, Certificates of deposit	(6.10%)
Percentage Change	15.90%