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Leases (Schedule Of Future Minimum Lease Payments Under Operating Leases) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014
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Operating Leased Assets [Line Items] |
2015 | $ 111,137 us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent
2016 | 50,879 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears
2017 | 30,980 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears
2018 | 15,910 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears
2019 | 7,090 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears
Thereafter | 17,597 us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter
Future minimum lease payments under operating leases | 233,593 us-gaap_OperatingLeasesFutureMinimumPaymentsDue
Marine Equipment [Member] | Tank Barges [Member] |
Operating Leased Assets [Line Items] |
2015 | 13,930 us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_MarineServicesEquipmentMember / us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis = kex_TankBargesMember
2016 | 8,872 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_MarineServicesEquipmentMember / us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis = kex_TankBargesMember
2017 | 7,473 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_MarineServicesEquipmentMember / us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis = kex_TankBargesMember
2018 | 6,594 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_MarineServicesEquipmentMember / us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis = kex_TankBargesMember
2019 | 3,567 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_MarineServicesEquipmentMember / us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis = kex_TankBargesMember
Thereafter | 2,239 us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_MarineServicesEquipmentMember / us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis = kex_TankBargesMember
Future minimum lease payments under operating leases | 42,675 us-gaap_OperatingLeasesFutureMinimumPaymentsDue / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_MarineServicesEquipmentMember / us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis = kex_TankBargesMember
Marine Equipment [Member] | Towing Vessels [Member] |
Operating Leased Assets [Line Items] |
2015 | 89,491 us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_MarineServicesEquipmentMember / us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis = kex_TowingVesselsMember
2016 | 35,656 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_MarineServicesEquipmentMember / us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis = kex_TowingVesselsMember
2017 | 17,746 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_MarineServicesEquipmentMember / us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis = kex_TowingVesselsMember
2018 | 4,212 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_MarineServicesEquipmentMember / us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis = kex_TowingVesselsMember
2019 | 0 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_MarineServicesEquipmentMember / us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis = kex_TowingVesselsMember
Thereafter | 0 us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_MarineServicesEquipmentMember / us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis = kex_TowingVesselsMember
Future minimum lease payments under operating leases | 147,105 us-gaap_OperatingLeasesFutureMinimumPaymentsDue / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_MarineServicesEquipmentMember / us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis = kex_TowingVesselsMember
Land Buildings and Equipment [Member] |
Operating Leased Assets [Line Items] |
2015 | 7,716 us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent / us-gaap_PropertyPlantAndEquipmentByTypeAxis = kex_LandBuildingsAndEquipmentMember
2016 | 6,351 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears / us-gaap_PropertyPlantAndEquipmentByTypeAxis = kex_LandBuildingsAndEquipmentMember
2017 | 5,761 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears / us-gaap_PropertyPlantAndEquipmentByTypeAxis = kex_LandBuildingsAndEquipmentMember
2018 | 5,104 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears / us-gaap_PropertyPlantAndEquipmentByTypeAxis = kex_LandBuildingsAndEquipmentMember
2019 | 3,523 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears / us-gaap_PropertyPlantAndEquipmentByTypeAxis = kex_LandBuildingsAndEquipmentMember
Thereafter | 15,358 us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter / us-gaap_PropertyPlantAndEquipmentByTypeAxis = kex_LandBuildingsAndEquipmentMember
Future minimum lease payments under operating leases | $ 43,813 us-gaap_OperatingLeasesFutureMinimumPaymentsDue / us-gaap_PropertyPlantAndEquipmentByTypeAxis = kex_LandBuildingsAndEquipmentMember

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- Definition Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
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- Definition Amount of required minimum rental payments maturing in the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
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- Definition Amount of required minimum rental payments maturing in the forth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
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- Definition Amount of required minimum rental payments maturing in the third fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
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- Definition Amount of required minimum rental payments maturing in the second fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
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- Definition Amount of required minimum rental payments maturing after the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
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