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Debt - Hawaii Retail Credit Facilities (Details) - USD ($)		12 Months Ended
	Dec. 21, 2017	Dec. 31, 2017	Dec. 21, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 17, 2015
Debt Instrument [Line Items]
Cost associated with termination of debt		$ 8,633,000		$ 0	$ 19,669,000
Hawaii Retail Credit Agreement
Debt Instrument [Line Items]
Interest rate during period		4.00%
Hawaii Retail Credit Agreement | Term Loan
Debt Instrument [Line Items]
Line credit maximum borrowing amount						$ 110,000,000
Annual principal payment		$ 2,750,000.000
Hawaii Retail Credit Agreement | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Line credit maximum borrowing amount						$ 5,000,000
Cost associated with termination of debt	$ 1,200,000
Base Rate | Minimum | Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument margin rate			1.50%
Base Rate | Maximum | Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument margin rate			2.25%
Eurodollar | Minimum | Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument margin rate			2.50%
Eurodollar | Maximum | Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument margin rate			3.25%

X

- Definition

This represents applicable margin rate for debt instrument based on the leverage ratio maintained.

+ References

No definition available.

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- Definition

Amount of the total principal payments made during the annual reporting period.

+ 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))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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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.

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- Definition

The effective interest rate during the reporting period.

+ 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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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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 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

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- Definition

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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