Commitments And Contingencies (Lease Commitments) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
2014	$ 123,105
2015	148,720
2016	113,019
2017	84,586
2018	51,512
Thereafter	67,488
Total lease commitments	588,430
Vessels [Member]
2014	119,672
2015	144,478
2016	109,155
2017	80,705
2018	47,595
Thereafter	45,938
Total lease commitments	547,543
Facilities And Other [Member]
2014	3,433
2015	4,242
2016	3,864
2017	3,881
2018	3,917
Thereafter	21,550
Total lease commitments	$ 40,887

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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

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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.

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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.

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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.

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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.

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