Debt Instrument, Interest Rate, Effective Percentage Including Effect of Interest Rate Swap Contracts

No definition available.

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- Definition

Debt Instrument Periodic Payment Percentage of initial Principal

+ References

No definition available.

+ Details

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- Definition

MaximumUnusedCommitmentBeforeRateChange

+ References

No definition available.

+ Details

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
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+ Details

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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.

+ Details

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- Definition

Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 22
-Subparagraph b
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- Definition

Percentage of fee on unused borrowings under debtor-in-possession financing arrangement.

+ References

No definition available.

+ Details

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- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-Subparagraph (SX 210.5-02.19(b),22(b))
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-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 22
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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 210
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-Section 03
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+ Details

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- Definition

Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-Name Regulation S-X (SX)
-Number 210
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+ Details

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Name Regulation S-X (SX)
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- References

No definition available.

+ Details

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- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

No definition available.

+ Details

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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Name Regulation S-X (SX)
-Number 210
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-Name Regulation S-X (SX)
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-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 10
-Section F

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LONG-TERM DEBT (Schedule of Long-term Debt) (Details) - USD ($)	Sep. 29, 2015	Mar. 13, 2014	Dec. 31, 2015	Mar. 31, 2015	Mar. 27, 2015	Mar. 11, 2014
Debt Instrument [Line Items]
Subordinated Debt			$ 78,126,000	$ 72,500,000
Long-term Debt, Current and Noncurrent [Abstract]
Long-term debt			106,222,000	101,213,000
Less amounts due within 12 months			0	0
Long-term debt, excluding current maturities			106,222,000	101,213,000
Fourth Amended and Restated Credit Agreement [Member] \| Lower Lakes Towing Ltd. [Member] \| Loans Payable [Member] \| Canadian Term Loan [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Debt Instrument Periodic Payment Percentage of Initial Principal		1.00%
Fourth Amended and Restated Credit Agreement [Member] \| Lower Lakes Towing Ltd. [Member] \| Loans Payable [Member] \| Canadian Term Loan [Member] \| Canadian Prime Rate [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Basis spread on variable rate		3.00%
Fourth Amended and Restated Credit Agreement [Member] \| Lower Lakes Towing Ltd. [Member] \| Loans Payable [Member] \| Canadian Term Loan [Member] \| Canadian BA Rate [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Basis spread on variable rate		4.00%
Fourth Amended and Restated Credit Agreement [Member] \| Grand River Navigation Company, Inc. [Member] \| Loans Payable [Member] \| US Term Loan [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Debt Instrument Periodic Payment Percentage of Initial Principal		1.00%
Fourth Amended and Restated Credit Agreement [Member] \| Grand River Navigation Company, Inc. [Member] \| Loans Payable [Member] \| US Term Loan [Member] \| LIBOR [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Basis spread on variable rate		4.00%
Fourth Amended and Restated Credit Agreement [Member] \| Grand River Navigation Company, Inc. [Member] \| Loans Payable [Member] \| US Term Loan [Member] \| US Base Rate [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Basis spread on variable rate		3.00%
Credit Facitities [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Debtor-in-Possession Financing, Fee on Unused Borrowings					0.25%
MaximumUnusedCommitmentBeforeRateChange					50.00%
Credit Facitities [Member] \| Canadian Guarantors [Member] \| Revolving Credit Facility [Member] \| Canadian Revolving Facility [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Long-term debt			$ 40,462,000	$ 44,213,000
Effective interest rate including effect of interest rate swap contracts			3.58%	3.75%
Credit Facitities [Member] \| US Guarantors [Member] \| Revolving Credit Facility [Member] \| US Revolving Facility [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Long-term debt			$ 65,760,000	$ 57,000,000
Effective interest rate including effect of interest rate swap contracts			3.08%	3.03%
Subordinated Debt [Member] \| Lower Lakes Towing Ltd. [Member] \| Second Lien Canadian Term Loan [Member] \| LIBOR [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Basis spread on variable rate		9.50%
Subordinated Debt [Member] \| Lower Lakes Towing Ltd. [Member] \| Second Lien Canadian Term Loan [Member] \| US Base Rate [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Basis spread on variable rate		8.50%
Subordinated Debt [Member] \| Grand River Navigation Company, Inc. [Member] \| Second Lien US Term Loan [Member] \| LIBOR [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Basis spread on variable rate		9.50%
Subordinated Debt [Member] \| Grand River Navigation Company, Inc. [Member] \| Second Lien US Term Loan [Member] \| US Base Rate [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Basis spread on variable rate		8.50%
Canada, Dollars \| Fourth Amended and Restated Credit Agreement [Member] \| Canadian Prime Rate [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Basis spread on variable rate		3.00%
Canada, Dollars \| Secured Debt [Member] \| Fourth Amended and Restated Credit Agreement [Member] \| Lower Lakes Towing Ltd. [Member] \| Canadian Term Loan [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Debt Instrument, Face Amount						$ 54,882,000
Canada, Dollars \| Revolving Credit Facility [Member] \| Fourth Amended and Restated Credit Agreement [Member] \| Lower Lakes Towing Ltd. [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity						17,500,000
Canada, Dollars \| Swing Line Facility [Member] \| Fourth Amended and Restated Credit Agreement [Member] \| Lower Lakes Towing Ltd. [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity						4,000,000
Canada, Dollars \| Swing Line Facility [Member] \| Credit Facitities [Member] \| Canadian Guarantors [Member] \| Revolving Credit Facility [Member] \| Canadian Revolving Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity					$ 8,000,000
United States of America, Dollars \| Lower Lakes Towing Ltd. [Member] \| Second Lien Canadian Term Loan [Member]
Debt Instrument [Line Items]
Subordinated Debt			$ 39,826,000	$ 34,200,000
United States of America, Dollars \| Grand River Navigation Company, Inc. [Member] \| Second Lien US Term Loan [Member]
Debt Instrument [Line Items]
Subordinated Debt			38,300,000	$ 38,300,000
United States of America, Dollars \| Fourth Amended and Restated Credit Agreement [Member] \| LIBOR [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Basis spread on variable rate		4.00%
United States of America, Dollars \| Fourth Amended and Restated Credit Agreement [Member] \| US Base Rate [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Basis spread on variable rate		3.00%
United States of America, Dollars \| Credit Facitities [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Debt Instrument, Unused Borrowing Capacity, Amount			$ 63,364,000
United States of America, Dollars \| Credit Facitities [Member] \| Canadian Guarantors [Member] \| Revolving Credit Facility [Member] \| Canadian Revolving Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity					80,000,000
United States of America, Dollars \| Credit Facitities [Member] \| US Guarantors [Member] \| Revolving Credit Facility [Member] \| US Revolving Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity					90,000,000
United States of America, Dollars \| Secured Debt [Member] \| Fourth Amended and Restated Credit Agreement [Member] \| Grand River Navigation Company, Inc. [Member] \| US Term Loan [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Debt Instrument, Face Amount						55,246,000
United States of America, Dollars \| Subordinated Debt [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Debt Instrument, Unused Borrowing Capacity, Amount						32,500,000
United States of America, Dollars \| Subordinated Debt [Member] \| Lower Lakes Towing Ltd. [Member] \| Second Lien Canadian Term Loan [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Debt Instrument, Face Amount						34,200,000
Proceeds from Issuance of Debt	$ 5,626,000
United States of America, Dollars \| Subordinated Debt [Member] \| Grand River Navigation Company, Inc. [Member] \| Second Lien US Term Loan [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Debt Instrument, Face Amount						38,300,000
United States of America, Dollars \| Subordinated Debt [Member] \| Amended Second Lien Credit Agreement [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Debt Instrument, Unused Borrowing Capacity, Amount					22,500,000
United States of America, Dollars \| Revolving Credit Facility [Member] \| Fourth Amended and Restated Credit Agreement [Member] \| Lower Lakes Transportation Company [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity						17,500,000
United States of America, Dollars \| Swing Line Facility [Member] \| Fourth Amended and Restated Credit Agreement [Member] \| Lower Lakes Transportation Company [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity						50,000
United States of America, Dollars \| Swing Line Facility [Member] \| Credit Facitities [Member] \| US Guarantors [Member] \| Revolving Credit Facility [Member] \| US Revolving Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity					$ 9,000,000
Maximum [Member] \| Credit Facitities [Member]
Long-term Debt, Current and Noncurrent [Abstract]
Debtor-in-Possession Financing, Fee on Unused Borrowings					0.375%
Maximum [Member] \| Canada, Dollars \| Seasonal Overadvance Facility [Member] \| Fourth Amended and Restated Credit Agreement [Member] \| Lower Lakes Towing Ltd. [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity						17,500,000
Maximum [Member] \| United States of America, Dollars \| Seasonal Overadvance Facility [Member] \| Fourth Amended and Restated Credit Agreement [Member] \| Lower Lakes Towing Ltd. [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity						17,000,000
Maximum [Member] \| United States of America, Dollars \| Seasonal Overadvance Facility [Member] \| Fourth Amended and Restated Credit Agreement [Member] \| Lower Lakes Transportation Company [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity						$ 17,000,000