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Accumulated Other Comprehensive Income (Loss) (Components Of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Other comprehensive income (loss), Pre-tax Amount |  | $ 1,246 | $ 11,761
Other comprehensive income (loss), Tax Effect |  | 481 | 4,539
Other comprehensive income (loss), before Reclassifications, Net-of-tax Amount |  | 719 | 7,490
Amounts reclassified from accumulated other comprehensive income |  | 46 | (268)
Total other comprehensive income, net of tax |  | 765 | 7,222
Securities Available for Sale and Transferred Securities [Member] |  |  |
Other comprehensive income (loss), before Reclassifications, Pre-tax Amount |  | 1,170 | 12,196
Reclassification, Pre-tax Amount | [1] | (203) | (662)
Other comprehensive income (loss), Pre-tax Amount |  | 967 | 11,534
Other comprehensive income (loss), before Reclassifications, Tax Effect |  | 451 | 4,706
Reclassification, Tax Effect | [1] | (78) | (255)
Other comprehensive income (loss), Tax Effect |  | 373 | 4,451
Other comprehensive income (loss), before Reclassifications, Net-of-tax Amount |  | 719 | 7,490
Amounts reclassified from accumulated other comprehensive income | [1] | (125) | (407)
Total other comprehensive income, net of tax |  | 594 | 7,083
Pension And Post-Retirement Obligations [Member] |  |  |
Reclassification, Pre-tax Amount |  | 279 | 227
Reclassification, Tax Effect |  | 108 | 88
Amounts reclassified from accumulated other comprehensive income |  | 171 | 139
Total other comprehensive income, net of tax |  | 171 | 139
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member] |  |  |
Other comprehensive income (loss), Pre-tax Amount |  | (13) | (12)
Other comprehensive income (loss), Tax Effect |  | 4 | 5
Total other comprehensive income, net of tax |  | (9) | (7)
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Including Portion Attributable to Noncontrolling Interest [Member] |  |  |
Other comprehensive income (loss), Pre-tax Amount |  | 292 | 239
Other comprehensive income (loss), Tax Effect |  | (112) | (93)
Total other comprehensive income, net of tax |  | 180 | 146
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member] |  |  |
Other comprehensive income (loss), Pre-tax Amount |  | 279 | 227
Other comprehensive income (loss), Tax Effect |  | (108) | (88)
Total other comprehensive income, net of tax |  | $ 171 | $ 139
[1] | Includes amounts related to the amortization/accretion of unrealized net gains and losses related to the Company's reclassification of available for sale investment securities to the held to maturity category. The unrealized net gains/losses will be amortized/accreted over the remaining life of the investment securities as an adjustment of yield.

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- Definition Amount before tax and 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=36458714&loc=SL7669686-108580 + Details
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- Definition Amount after tax, before 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 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=51821188&loc=d3e1436-108581 Reference 2: 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=36458714&loc=SL7669686-108580 + Details
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- Definition Amount of tax expense (benefit) allocated to other comprehensive income (loss) before 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=18498875&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=36458714&loc=d3e640-108580 + Details
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- Definition Amount before tax of other comprehensive income (loss) attributable to parent entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=51664549&loc=SL4569643-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=51664549&loc=SL4569616-111683 + Details
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