Components of Other Comprehensive Income/(loss) (Schedule of Reclassification from AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassifed from AOCI	$ 249	$ 470	$ 543	$ 202
Securities AFS
Accumulated Other Comprehensive Income (Loss) [Line Items]
Realized gains/(losses)	(405)	0	(449)	(1,654)
Tax expense/(benefit)	155	0	172	634
Amounts reclassifed from AOCI	(250)	0	(277)	(1,020)
Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Realized gains/(losses)	(1,465)	(607)	(2,845)	(1,213)
Tax expense/(benefit)	561	233	1,089	465
Amounts reclassifed from AOCI	(904)	(374)	(1,756)	(748)
Pension and Postretirement Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Realized gains/(losses)	2,273	1,369	4,173	3,195
Tax expense/(benefit)	(870)	(525)	(1,597)	(1,225)
Amounts reclassifed from AOCI	$ 1,403	$ 844	$ 2,576	$ 1,970

Reclassificaition from Accumulated Other Comprehensive Income, Current Period, Net of Tax

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+ References

No definition available.

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Amount before tax of reclassification adjustments of other comprehensive income (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580

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Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 20
-Section 45
-Paragraph 11
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=65896914&loc=d3e39076-109324

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e640-108580

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