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v2.4.0.8

Bank Debt (Details) (USD $) | 9 Months Ended
--- | ---
Sep. 30, 2014
Debt Instrument [Line Items] |
Deferred financing costs expensed | $ 1,000,000
Debt maturity date | Aug. 29, 2019
PNC Bank [Member] |
Debt Instrument [Line Items] |
Closing costs of debt | 6,800,000
Loan initiation amortization period | 5 years
Credit agreement, amount outstanding | 345,600,000
Credit facility, maximum borrowing capacity | 398,000,000
Maximum [Member] |
Debt Instrument [Line Items] |
Maximum leverage ratio | 325.00%
Revolving Credit Facility [Member] | PNC Bank [Member] |
Debt Instrument [Line Items] |
Credit facility, maximum borrowing capacity | 250,000,000
Term Loan [Member] |
Debt Instrument [Line Items] |
Amortization period of loan | 5 years
Term Loan [Member] | Debt Instrument, Redemption, Period Five [Member] |
Debt Instrument [Line Items] |
Loan annual amortization | 20.00%
Term Loan [Member] | Debt Instrument, Redemption, Period Four [Member] |
Debt Instrument [Line Items] |
Loan annual amortization | 20.00%
Term Loan [Member] | Debt Instrument, Redemption, Period One [Member] |
Debt Instrument [Line Items] |
Loan annual amortization | 10.00%
Term Loan [Member] | Debt Instrument, Redemption, Period Three [Member] |
Debt Instrument [Line Items] |
Loan annual amortization | 15.00%
Term Loan [Member] | Debt Instrument, Redemption, Period Two [Member] |
Debt Instrument [Line Items] |
Loan annual amortization | 15.00%
Term Loan [Member] | PNC Bank [Member] |
Debt Instrument [Line Items] |
Debt face amount | 175,000,000
Sunrise Coal [Member] | PNC Bank [Member] |
Debt Instrument [Line Items] |
Percentage decrease in amount of debt with maximum interest rate per quarter after commencement date | 10.00%
Date that the percentage of debt with a maximum interest rate begins to decrease quarterly | Mar. 31, 2016
Sunrise Coal [Member] | Maximum [Member] | PNC Bank [Member] |
Debt Instrument [Line Items] |
Interest rate maximum | 5.00%
Sunrise Coal [Member] | Revolving Credit Facility [Member] | PNC Bank [Member] |
Debt Instrument [Line Items] |
Amount of debt with maximum interest rate | 100,000,000
Sunrise Coal [Member] | Term Loan [Member] | PNC Bank [Member] |
Debt Instrument [Line Items] |
Amount of debt with maximum interest rate | $ 175,000,000
Leverage Ratio Less Than 1 [Member] | London Interbank Offered Rate (LIBOR) [Member] |
Debt Instrument [Line Items] |
Debt, interest rate spread on variable rate | 2.25%
Leverage Ratio Between 1 and 1.5 [Member] | London Interbank Offered Rate (LIBOR) [Member] |
Debt Instrument [Line Items] |
Debt, interest rate spread on variable rate | 2.50%
Leverage Ratio Between 1.5 and 2 [Member] | London Interbank Offered Rate (LIBOR) [Member] |
Debt Instrument [Line Items] |
Debt, interest rate spread on variable rate | 2.75%
Leverage Ratio Between 2 and 2.5 [Member] | London Interbank Offered Rate (LIBOR) [Member] |
Debt Instrument [Line Items] |
Debt, interest rate spread on variable rate | 3.00%
Leverage Ratio Above 2.5 [Member] | London Interbank Offered Rate (LIBOR) [Member] |
Debt Instrument [Line Items] |
Debt, interest rate spread on variable rate | 3.50%

X
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- Definition The net increase(decrease) in interest income during the period representing the allocation of deferred loan origination fees less deferred loan origination costs using the effective interest method over the term of the debt arrangement to which they pertain taking into account the effect of prepayments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.1) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Direct Loan Origination Costs -URI http://asc.fasb.org/extlink&oid=6510860 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 20 -Section 30 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6378273&loc=d3e8446-111530 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 20 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6962437&loc=d3e7402-111529 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 20 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27723605&loc=d3e8622-111531 + Details
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- Definition Remaining amortization period for discount on the liability component of convertible debt which may be settled in cash upon conversion, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6928298&loc=SL6031898-161870 + Details
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- Definition Amount of the fee that accompanies borrowing money under the debt instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 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 210.5-02.22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Maximum contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 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 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 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 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + 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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