Securities (Schedule of Securities by Contractual Maturity) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Amortized Cost
Due in one year or less	$ 4,450
Due after one year through five years	18,499
Due after five years through ten years	65,930
Due after ten years	298,683
Amortized Cost	921,890	$ 834,850
Fair Value
Due in one year or less	4,464
Due after one year through five years	19,149
Due after five years through ten years	70,284
Due after ten years	318,220
Fair Value	962,270	854,825
MBS/CMO
Amortized Cost
MBS/CMO	534,328
Amortized Cost	534,328	526,907
Fair Value
MBS/CMO	550,153
Fair Value	$ 550,153	$ 530,525