Deposits (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Banking and Thrift [Abstract]
Checking, non-interest bearing	$ 352,570	$ 356,797
Checking, interest bearing	597,558	600,046
Savings accounts	1,429,507	1,258,506
Certificates of deposit	355,127	395,437
Total deposits	$ 2,734,762	$ 2,610,786
Percentage Change, Checking, non-interest bearing	(1.20%)
Percentage Change, Checking, interest bearing	(0.40%)
Percentage Change, Savings accounts	13.60%
Percentage Change, Certificates of deposit	(10.20%)
Percentage Change	4.70%