Securities (Schedule of Securities by Contractual Maturity) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Securities Available-for-Sale: Amortized cost
Due in one year or less	$ 2,512
Due after one year through five years	19,642
Due after five years through ten years	68,972
Due after ten years	216,817
Amortized Cost	834,850	$ 821,254
Securities Available-for-Sale: Fair Value
Due in one year or less	2,518
Due after one year through five years	20,070
Due after five years through ten years	72,546
Due after ten years	229,166
Fair Value	854,825	812,611
MBS/CMO
Securities Available-for-Sale: Amortized cost
MBS/CMO	526,907
Amortized Cost	526,907	529,805
Securities Available-for-Sale: Fair Value
MBS/CMO	530,525
Fair Value	$ 530,525	$ 518,078

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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