Securities (Schedule of Securities by Contractual Maturity) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Securities Available-for-Sale: Amortized cost
Due in one year or less	$ 3,387
Due after one year through five years	16,300
Due after five years through ten years	75,164
Due after ten years	152,499
Total Amortized Cost	719,555	$ 631,800
Securities Available-for-Sale: Fair Value
Due in one year or less	3,413
Due after one year through five years	16,806
Due after five years through ten years	77,023
Due after ten years	150,277
Fair Value	709,786	637,840
MBS/CMO – Residential
Securities Available-for-Sale: Amortized cost
Available-for-Sale, amortized cost	471,852
Total Amortized Cost	471,852	426,087
Securities Available-for-Sale: Fair Value
Available-for-Sale, Fair Value	461,914
Fair Value	461,914	423,961
Equity Securities
Securities Available-for-Sale: Amortized cost
Available-for-Sale, amortized cost	353
Total Amortized Cost	353	353
Securities Available-for-Sale: Fair Value
Available-for-Sale, Fair Value	353
Fair Value	$ 353	$ 353