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Debt: (Details) (USD $) In Millions, unless otherwise specified |  |  | 3 Months Ended | 9 Months Ended | 3 Months Ended | 1 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2012 | Dec. 31, 2011 | Jun. 30, 2012 Unsecured revolving credit facility | Sep. 30, 2012 Unsecured revolving credit facility | Sep. 30, 2012 Unsecured revolving credit facility Minimum | Sep. 30, 2012 Unsecured revolving credit facility Maximum [Member] | Jun. 30, 2012 Unsecured Debt [Member] item | Jun. 30, 2012 Unsecured debt, tranche maturing in 2023 | Jun. 30, 2012 Unsecured debt, tranche maturing in 2027 | Jun. 30, 2012 Unsecured debt, tranche maturing in 2032 | Jun. 30, 2012 Secured debt | Sep. 30, 2012 Secured debt MatNav
Debt |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  | $ 375.0 |  |  |  |  |  |  |  |  |
Credit facility term |  |  | 5 years |  |  |  |  |  |  |  |  |
Current borrowing capacity |  |  |  | 37.0 |  |  |  |  |  |  |  |
Cash borrowings |  |  |  | 30.0 |  |  |  |  |  |  |  |
Letters of credit |  |  |  | 7.0 |  |  |  |  |  |  |  |
New unsecured, fixed rate, amortizing long-term debt |  |  |  |  |  |  | 170.0 | 77.5 | 55.0 | 37.5 |  |
Number of tranches |  |  |  |  |  |  | 3 |  |  |  |  |
Interest rate (as a percent) |  |  |  |  |  |  |  | 3.66% | 4.16% | 4.31% |  |
Weighted average interest rate (as a percent) |  |  |  |  |  |  | 3.97% |  |  |  |  |
Weighted average period |  |  |  |  |  |  | 9 years 3 months 18 days |  |  |  |  |
Release of MV Manulani as security for debt |  |  |  |  |  |  |  |  |  |  | 56.0 | 72.6
Total debt | $ 328.6 | $ 197.5 |  |  |  |  |  |  |  |  |  |
Debt covenant, required ratio of debt to consolidated EBITDA |  |  |  | 1.99 |  | 3.25 |  |  |  |  |  |
Ratio of consolidated EBITDA to interest expense |  |  |  | 16.71 | 3.50 |  |  |  |  |  |  |
Debt covenant, required principal amount of priority debt as a percentage of consolidated tangible assets |  |  |  | 6.50% |  | 20.00% |  |  |  |  |  |
Debt covenant, required principal amount of priority debt (excluding Title XI) as a percentage of consolidated tangible assets |  |  |  |  |  | 10.00% |  |  |  |  |  |

X
- Definition Represents the amount of the debt instrument for which the collateral was released. + References No definition available. + Details
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- Definition Represents the actual consolidated interest coverage ration used to determine compliance with the financial covenant of the line of credit facility. + References No definition available. + Details
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- Definition Represents the principal amount of other debt, which is not Title XI priority debt as a percentage of consolidated tangible assets. + References No definition available. + Details
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- Definition Represents the actual amount of principal amount of priority debt as a percentage of consolidated tangible assets used to determine compliance with the financial covenant of the line of credit facility. + References No definition available. + Details
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- Definition Represents the actual ratio used to determine compliance with the ratio of debt to consolidated EBITDA financial covenant of the line of credit facility. + References No definition available. + Details
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- Definition Represents the term for the credit facility. + References No definition available. + Details
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- Definition Represents the weighted average period of the tranches of unsecured long-term debt. + References No definition available. + Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 + Details
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- Definition Amount borrowed under the credit facility as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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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 -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 Reference 5: 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) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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