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Securities (Schedule of Information Regarding Securities with Unrealized Losses) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Total temporarily impaired securities Fair Value	$ 139,925	$ 232,817
Total temporarily impaired securities Unrealized Losses	879	4,138
Total temporarily impaired securities Fair Value	17,844	19,943
Total temporarily impaired securities Unrealized Losses	442	622
Total temporarily impaired securities Fair Value	157,769	252,760
Total temporarily impaired securities Unrealized Losses	1,321	4,760
Government-sponsored enterprise securities [Member]
AFS Fair Value	7,991	7,990
AFS Unrealized Losses	7	7
AFS Fair Value
AFS Unrealized Losses
Total AFS Fair Value	7,991	7,990
Total AFS Unrealized Losses	7	7
Mortgage-backed securities [Member]
AFS Fair Value	131,117	196,999
AFS Unrealized Losses	865	3,841
AFS Fair Value	16,909	19,001
AFS Unrealized Losses	377	552
Total AFS Fair Value	148,026	216,000
Total AFS Unrealized Losses	1,242	4,393
Corporate bonds [Member]
AFS Fair Value		27,027
AFS Unrealized Losses		259
AFS Fair Value	935	935
AFS Unrealized Losses	65	65
Total AFS Fair Value	935	27,962
Total AFS Unrealized Losses	65	324
Equity securities [Member]
AFS Fair Value
AFS Unrealized Losses
AFS Fair Value		7
AFS Unrealized Losses		5
Total AFS Fair Value		7
Total AFS Unrealized Losses		5
State and local governments [Member]
AFS Fair Value	817	801
AFS Unrealized Losses	7	31
AFS Fair Value
AFS Unrealized Losses
Total AFS Fair Value	817	801
Total AFS Unrealized Losses	$ 7	$ 31

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