DEBT - Bonds Payable, Additional Information(Details)
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12 Months Ended |
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Aug. 01, 2012
USD ($)
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Dec. 31, 2014
USD ($)
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Dec. 31, 2015
USD ($)
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Aug. 27, 2014
USD ($)
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Dec. 01, 2010 |
| Debt Instrument [Line Items] |
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| Tendered bonds |
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$ 298,000,000
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$ 0
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| Debt |
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592,867,000
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271,057,000
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| Jefferson Terminal |
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| Debt Instrument [Line Items] |
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| Fair value of bonds at acquisition |
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$ 115,000,000
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| Bonds payable |
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| Debt Instrument [Line Items] |
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| Unamortized premium |
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1,751,000
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| Debt |
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346,521,000
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47,261,000
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| Bonds payable | Series 2010 Bonds |
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| Debt Instrument [Line Items] |
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| Repayments of debt |
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2,000,000
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| Repayments of bonds |
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298,000,000
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| Debt |
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298,000,000
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0
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| Bonds payable | Series 2010 Bonds | Jefferson Terminal |
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| Debt Instrument [Line Items] |
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| Debt face amount |
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300,000,000
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| Interest rate |
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0.60%
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| Bonds payable | Series 2012 Bonds |
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| Debt Instrument [Line Items] |
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| Unamortized premium |
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$ 1,791,000
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1,751,000
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| Service coverage ratio |
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1.25
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| Debt |
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$ 48,521,000
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$ 47,261,000
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| Bonds payable | Series 2012 Bonds | Jefferson Terminal |
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| Debt Instrument [Line Items] |
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| Fair value of bonds at acquisition |
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48,554,000
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| Unamortized premium |
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$ 1,823,000
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| Bonds payable | Series 2012 Bonds | Jefferson Terminal |
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| Debt Instrument [Line Items] |
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| Debt face amount |
$ 46,875,000
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| Period of interest reserve |
6 months
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| Interest rate |
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8.25%
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