Accumulated Other Comprehensive Loss (Components of Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Available for sale securities - all other: Net unrealized losses on all other AFS securities, Net of tax	$ (12)	$ 5,306	$ 667	$ 8,342
Cash flow hedges: Unrealized holding gains, Before Tax	24	93	59	185
Cash flow hedges: Unrealized holding gains, Tax Effect	(10)	(37)	(24)	(74)
Cash flow hedges: Unrealized holding gains, Net of Tax	14	56	35	111
Unrealized net actuarial gain (loss), Net of Tax	(746)	164	(836)	37
Other comprehensive income, Before tax amount	1,005	5,934	4,763	15,262
Other comprehensive income, Tax (expense) benefit	(401)	(2,372)	(1,899)	(6,101)
Other comprehensive income, Net	604	3,562	2,864	9,161
Investment securities- with OTTI [Member]
Available for sale (AFS) securities with OTTI: Unrealized holding gains, Before tax amount	2,246	852	5,024	5,401
Available for sale (AFS) securities with OTTI: Unrealized holding gains, Tax effect	(896)	(341)	(2,004)	(2,160)
Available for sale (AFS) securities with OTTI: Unrealized holding gains, Net of tax	1,350	511	3,020	3,241
Available for sale (AFS) securities with OTTI: Less: accretable yield recognized in income	173	171	340	331
Available for sale (AFS) securities with OTTI: Less: accretable yield recognized in income, Tax effect	(69)	(68)	(136)	(132)
Other than temporary impairment losses, investments, reclassification adjustment of noncredit portion included in net income, Available for sale securities, Net of tax	104	103	204	199
Available for sale (AFS) securities with OTTI: Net unrealized gains on investments with OTTI, Before tax amount	2,073	681	4,684	5,070
Available for sale (AFS) securities with OTTI: Net unrealized gains on investments with OTTI: Net unrealized gains on investments with OTTI, Tax effect	(827)	(273)	(1,868)	(2,028)
Available for sale (AFS) securities with OTTI: Net unrealized gains on investments with OTTI, Net of tax	1,246	408	2,816	3,042
Investment Securities -All Other AFS [Member]
Securities: Unrealized holding losses, Before tax	60	8,753	1,092	13,743
Securities: Unrealized holding losses, Tax effect	(24)	(3,499)	(435)	(5,494)
Securities: Unrealized holding losses, Net of tax	36	5,254	657	8,249
Securities: Less: gains recognized in income, Before tax	80	(86)	(17)	(154)
Securities: Less: gains recognized in income, Tax effect	(32)	34	7	61
Securities: gains recognized in income, Net of tax	48	(52)	(10)	(93)
Available for sale securities: Net unrealized losses on all other AFS securities, Before Tax	(20)	8,839	1,109	13,897
Available for sale securities: Net unrealized losses on all other AFS securities, Tax effect	8	(3,533)	(442)	(5,555)
Available for sale securities - all other: Net unrealized losses on all other AFS securities, Net of tax	(12)	5,306	667	8,342
Investment Securities HTM [Member]
Securities: Unrealized holding losses, Before tax	0	(3,984)	0	(3,984)
Securities: Unrealized holding losses, Tax effect	0	1,593	0	1,593
Securities: Unrealized holding losses, Net of tax	0	(2,391)	0	(2,391)
Securities: Less: gains recognized in income, Before tax	(152)	(32)	(268)	(32)
Securities: Less: gains recognized in income, Tax effect	61	13	107	13
Securities: gains recognized in income, Net of tax	(91)	(19)	(161)	(19)
Held to maturity securities: Net unrealized losses on all HTM securities, Before tax	152	(3,952)	268	(3,952)
Held to maturity securities: Net unrealized losses on all HTM securities, Tax	(61)	1,580	(107)	1,580
Held to maturity securities: Net unrealized losses on all HTM securities, After tax	91	(2,372)	161	(2,372)
Pension Plan [Member]
Unrealized net actuarial gain (loss), Before Tax	(1,425)	186	(1,759)	(112)
Unrealized net actuarial gain (loss), Tax Effect	569	(74)	701	45
Unrealized net actuarial gain (loss), Net of Tax	(856)	112	(1,058)	(67)
Net plan liability adjustment, Before Tax	(1,241)	273	(1,391)	61
Net plan liability adjustment, Tax Effect	495	(109)	555	(24)
Net plan liability adjustment, Net of Tax	(746)	164	(836)	37
SERP [Member]
Unrealized net actuarial gain (loss), Before Tax	0	0	0	0
Unrealized net actuarial gain (loss), Tax Effect	0	0	0	0
Unrealized net actuarial gain (loss), Net of Tax	0	0	0	0
Net plan liability adjustment, Before Tax	17	0	34	1
Net plan liability adjustment, Tax Effect	(6)	0	(13)	0
Net plan liability adjustment, Net of Tax	11	0	21	1
Amortization of unrecognized loss [Member] | Pension Plan [Member]
Less: amortization of unrecognized net gain (loss), Before Tax	(186)	(94)	(372)	(187)
Less: amortization of unrecognized net gain (loss), Tax Effect	74	38	148	75
Less: amortization of unrecognized net gain (loss), Net of Tax	(112)	(56)	(224)	(112)
Amortization of Unrecognized Gain [Member] | SERP [Member]
Less: amortization of unrecognized net gain (loss), Before Tax	(12)	5	(24)	9
Less: amortization of unrecognized net gain (loss), Tax Effect	5	(1)	10	(4)
Less: amortization of unrecognized net gain (loss), Net of Tax	(7)	4	(14)	5
Amortization of transition asset [Member] | Pension Plan [Member]
Less: amortization of transition asset, Before Tax	5	10	10	20
Less: amortization of transition asset, Tax Effect	(2)	(4)	(4)	(8)
Less: amortization of transition asset, Net of Tax	3	6	6	12
Amortization of prior service costs [Member] | Pension Plan [Member]
Less: amortization of prior service costs, Before Tax	(3)	(3)	(6)	(6)
Less: amortization of prior service costs, Tax Effect	2	1	2	2
Less: amortization of prior service costs, Net of Tax	(1)	(2)	(4)	(4)
Amortization of prior service costs [Member] | SERP [Member]
Less: amortization of prior service costs, Before Tax	(5)	(5)	(10)	(10)
Less: amortization of prior service costs, Tax Effect	1	1	3	4
Less: amortization of prior service costs, Net of Tax	$ (4)	$ (4)	$ (7)	$ (6)