Deposits (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Banking and Thrift [Abstract]
Checking, non-interest bearing	$ 345,386	$ 356,797
Checking, interest bearing	583,653	600,046
Savings accounts	1,374,415	1,258,506
Certificates of deposit	353,905	395,437
Total deposits	$ 2,657,359	$ 2,610,786
Percentage Change, Checking, non-interest bearing	(3.20%)
Percentage Change, Checking, interest bearing	(2.70%)
Percentage Change, Savings accounts	9.20%
Percentage Change, Certificates of deposit	(10.50%)
Percentage Change	1.80%