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Debt - Prior to the IPO - Working Capital Facility (Details) - USD ($) $ in Millions | Jul. 31, 2013 | Dec. 17, 2012 | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | --- | --- | ---
Working Capital Facility |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Line of credit facility, maximum borrowing capacity | $ 80.0 | $ 70.0 |  | $ 150.0
Working capital credit facility outstanding portion paid by affiliate |  |  | $ 29.0 |
Nonutilization fee |  | 0.50% |  |
Commitment fee percentage | 0.50% |  |  |
Working Capital Facility | Eurodollar | Minimum |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Basis spread on variable rate | 3.00% | 3.00% |  |
Working Capital Facility | Eurodollar | Maximum |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Basis spread on variable rate | 3.25% | 3.75% |  |
Working Capital Facility | Base Rate | Minimum |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Basis spread on variable rate | 2.00% | 2.00% |  |
Working Capital Facility | Base Rate | Maximum |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Basis spread on variable rate | 2.25% | 2.75% |  |
Working Capital Facility | Cost of Funds Rate | Minimum |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Basis spread on variable rate | 2.50% |  |  |
Working Capital Facility | Cost of Funds Rate | Maximum |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Basis spread on variable rate | 2.75% |  |  |
Letters of Credit Outstanding More than Two Business Days | Base Rate |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Basis spread on variable rate | 2.00% |  |  |

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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. + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used. + References No definition available. + 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 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 + Details
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