Refers to the amount of accruals for revenues earned included in accounts receivable.

No definition available.

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Refers to the accumulated amount of amortization of goodwill.

+ References

No definition available.

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Amount of interest expenses excludes capitalized interest during the period.

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No definition available.

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Represents the period in which recertification of ocean going vessels occur twice.

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No definition available.

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Represents the period of amortization of shipyard costs.

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No definition available.

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- Definition

Refers to the amount of receivables from insurance companies to cover claims in excess included in accounts receivable.

+ References

No definition available.

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- Definition

Refers to the period of revenue derived form the term contracts maturity.

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No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable to insurance entities to mitigate potential loss from various risks or to satisfy a promise to provide certain coverage's to employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.15(5))
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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 15
-Subparagraph a
-Article 7

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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-Name Accounting Standards Codification
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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Other income (expense) included in net income that results in no cash inflows or outflows in the period. Includes noncash adjustments to reconcile net income (loss) to cash provided by (used in) operating activities that are not separately disclosed.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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No definition available.

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The number of units or percentage investment held in the subsidiary by the limited liability company or limited partnership.

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-Name Accounting Standards Codification
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Summary of Significant Accounting Policies (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Significant Accounting Policies [Line Items]
Limited partnership ownership	50.00%
Accruals for revenues earned included in accounts receivable	$ 90,166,000	$ 143,615,000
Period in which recertification of ocean going vessels occur twice	5 years
Receivables from insurance companies to cover claims in excess included in accounts receivable	$ 77,684,000	92,379,000
Interest expense excludes capitalized interest	3,026,000	639,000	$ 0
Impairment of goodwill	0	0
Gross carrying value of goodwill	604,185,000	608,872,000
Accumulated amortization	15,566,000	15,566,000
Accumulated impairment losses	1,901,000	1,901,000
Net goodwill	586,718,000	591,405,000
Recognized amortization of major maintenance costs	22,126,000	16,409,000	9,029,000
Accrued insurance liabilities	$ 23,737,000	25,416,000	$ 22,971,000
Minimum [Member]
Significant Accounting Policies [Line Items]
Other investments ownership percentage	20.00%
Period of amortization of shipyard costs	30 months
Maximum [Member]
Significant Accounting Policies [Line Items]
Other investments ownership percentage	50.00%
Period of amortization of shipyard costs	60 months
Buildings [Member] \| Minimum [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives of the individual assets	10 years
Buildings [Member] \| Maximum [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives of the individual assets	40 years
Other Equipment [Member] \| Minimum [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives of the individual assets	2 years
Other Equipment [Member] \| Maximum [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives of the individual assets	10 years
Marine Transportation Equipment [Member] \| Minimum [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives of the individual assets	5 years
Marine Transportation Equipment [Member] \| Maximum [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives of the individual assets	40 years
Marine Transportation Segment [Member]
Significant Accounting Policies [Line Items]
Net goodwill	$ 381,243,000	381,243,000
Range of term contracts	1 year
Marine Transportation Segment [Member] \| Minimum [Member]
Significant Accounting Policies [Line Items]
Range of term contracts	1 year
Marine Transportation Segment [Member] \| Maximum [Member]
Significant Accounting Policies [Line Items]
Range of term contracts	3 years
Diesel Engine Services Segment [Member]
Significant Accounting Policies [Line Items]
Net goodwill	$ 205,475,000	$ 210,162,000