Comprehensive Income/Loss (Comprehensive Income/(Loss) Presented Net of Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2009
Equity [Abstract]
Deferred Gain Loss On Cash Flow Hedge	$ 209		$ 209		$ 281	$ 1,400
COMPREHENSIVE INCOME
Change in fair value of securities available for sale, pre tax amount	1,277	$ 3,016	2,173	$ 9,666
Change in fair value of securities available for sale, tax (expense) benefit	(485)	(1,161)	(849)	(3,747)
Change in fair value of securities available for sale, after tax amount	792	1,855	1,324	5,919
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale and Write-down of Securities, before Tax	1	2	2	(27)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale and Write-down of Securities, Tax	(1)	(1)	(1)	11
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale and Write-down of Securities, Net of Tax	0	1	1	(16)
Change in fair value of securities available for sale, pre tax amount	1,276	3,014	2,171	9,693
Change in fair value of securities available for sale, tax (expense) benefit	(484)	(1,160)	(848)	(3,758)
Change in fair value of securities available for sale, after tax amount	792	1,854	1,323	5,935
Change in fair value of cash flow hedges, pre tax amount	(399)	(882)	(341)	(1,338)
Change in fair value of cash flow hedges, tax (expense) benefit	162	360	138	548
Change in fair value of cash flow hedges, after tax amount	(237)	(522)	(203)	(790)
Less: net cash flow hedge losses reclassified into interest on borrowings expense, pre tax amount	80	640	173	1,301
Less: net cash flow hedge losses reclassified into earnings, tax (expense) benefit	33	262	71	532
Less: net cash flow hedge losses reclassified into interest on borrowings expense, after tax	(47)	(378)	(102)	(769)
Net change in fair value of cash flow hedges, pre tax amount	(319)	(242)	(168)	(37)
Net change in fair value of cash flow hedges, tax (expense) benefit	129	98	67	16
Net change in fair value of cash flow hedges	(190)	(144)	(101)	(21)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, before Tax	(7)	(28)	(14)	(56)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Tax	3	11	6	22
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	(4)	(17)	(8)	(34)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax	69	61	139	122
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), Tax	(28)	(25)	(57)	(50)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), Net of Tax	41	36	82	72
Amortization of certain costs included in net periodic retirement costs, pre tax amount	69	69	138	138
Amortization of certain costs included in net periodic retirement costs, tax (expense) benefit	(28)	(27)	(56)	(55)
Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), Net of Tax	41	42	82	83
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax	131	102	263	204
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax	(53)	(41)	(107)	(83)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	78	61	156	121
Total other comprehensive income, pre tax amount	1,088	2,874	2,266	9,860
Total other comprehensive income, tax (expense) benefit	(408)	(1,103)	(888)	(3,825)
Total other comprehensive income, after tax amount	$ 680	$ 1,771	$ 1,378	$ 6,035