Comprehensive Income/Loss (Comprehensive Income/(Loss) Presented Net of Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2009
Equity [Abstract]
Deferred Gain Loss On Cash Flow Hedge	$ 173		$ 173		$ 281	$ 1,400
COMPREHENSIVE INCOME
Change in fair value of securities available for sale, pre tax amount	347	$ (1,315)	2,520	$ 8,351
Change in fair value of securities available for sale, tax (expense) benefit	(152)	499	(1,001)	(3,248)
Change in fair value of securities available for sale, after tax amount	195	(816)	1,519	5,103
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	11	0	13	(27)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	(4)	0	(5)	11
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	7	0	8	(16)
Change in fair value of securities available for sale, pre tax amount	336	(1,315)	2,507	8,378
Change in fair value of securities available for sale, tax (expense) benefit	(148)	499	(996)	(3,259)
Change in fair value of securities available for sale, after tax amount	188	(816)	1,511	5,119
Change in fair value of cash flow hedges, pre tax amount	91	486	(250)	(852)
Change in fair value of cash flow hedges, tax (expense) benefit	(36)	(196)	102	352
Change in fair value of cash flow hedges, after tax amount	55	290	(148)	(500)
Less: net cash flow hedge losses reclassified into interest on borrowings expense, pre tax amount	(91)	(648)	(264)	(1,949)
Less: net cash flow hedge losses reclassified into earnings, tax (expense) benefit	37	264	108	796
Less: net cash flow hedge losses reclassified into interest on borrowings expense, after tax	(54)	(384)	(156)	(1,153)
Net change in fair value of cash flow hedges, pre tax amount	182	1,134	14	1,097
Net change in fair value of cash flow hedges, tax (expense) benefit	(73)	(460)	(6)	(444)
Net change in fair value of cash flow hedges	109	674	8	653
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	(6)	(28)	(20)	(84)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax	2	11	8	33
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax	(4)	(17)	(12)	(51)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	69	61	208	183
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax	(28)	(25)	(85)	(75)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax	41	36	123	108
Amortization of certain costs included in net periodic retirement costs, pre tax amount	70	69	208	207
Amortization of certain costs included in net periodic retirement costs, tax (expense) benefit	(29)	(29)	(85)	(84)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, after Tax	41	40	123	123
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	133	102	396	306
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	(55)	(43)	(162)	(126)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	78	59	234	180
Total other comprehensive income, pre tax amount	651	(79)	2,917	9,781
Total other comprehensive income, tax (expense) benefit	(276)	(4)	(1,164)	(3,829)
Total other comprehensive income, after tax amount	$ 375	$ (83)	$ 1,753	$ 5,952