Deposits (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Banking and Thrift, Interest [Abstract]
Checking, non-interest bearing	$ 727,177	$ 627,114
Checking, interest bearing	1,003,228	951,903
Savings accounts	2,330,102	2,126,183
Certificates of deposit	444,258	476,544
Total deposits	$ 4,504,765	$ 4,181,744
Percentage Change, Checking, non-interest bearing	16.00%
Percentage Change, Checking, interest bearing	5.40%
Percentage Change, Savings accounts	9.60%
Percentage Change, Certificates of deposit	(6.80%)
Percentage Change	7.70%