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Equity-Based Compensation | 9 Months Ended
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Sep. 30, 2012
Share-based Compensation [Abstract] |
Share-Based Compensation | Equity-Based Compensation Unit-based compensation expense related to the Partnership and stock-based compensation expense allocated to our Predecessor that was included in our condensed consolidated statements of operations was as follows (in thousands):
| Three Months Ended September 30, 2012 |  | Nine Months Ended September 30, 2012
| 2011 |  | 2012 |  | 2011 |  | 2012
| Predecessor |  |  |  | Predecessor |  |
Phantom common units | $ | — |  |  | $ | 6 |  |  | $ | — |  |  | $ | 6 |
Predecessor allocated expense | 206 |  |  | 241 |  |  | 587 |  |  | 810 |
Total equity-based compensation expense | $ | 206 |  |  | $ | 247 |  |  | $ | 587 |  |  | $ | 816 |
Phantom Common Unit Awards. During the quarter, our general partner issued a total of 32,500 phantom unit awards to certain directors and employees under the 2012 LTIP in connection with the closing of the IPO. The fair value of each phantom unit on the grant date is equal to the market price of our common unit on that date. The estimated fair value of our phantom units is amortized over the vesting period using the straight-line method. Non-employee director awards vest at the end of a three-year period and employee awards vest ratably over a five-year service period. Total unrecognized compensation cost related to our nonvested phantom units totaled $0.7 million as of September 30, 2012, which is expected to be recognized over a weighted-average period of 3 years. The fair value of nonvested service phantom units outstanding as of September 30, 2012, totaled $0.8 million. A summary of our phantom unit award activity for the nine months ended September 30, 2012, is set forth below:
| Number of Phantom Common Units |  | Weighted-Average Grant Date Fair Value
Nonvested at January 1, 2012 | — |  |  | — |
Granted | 32,500 |  |  | 23.09 |
Nonvested at September 30, 2012 | 32,500 |  |  | 23.09 |

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 93-6 -Paragraph 53 -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 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64, 65, A240 -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 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901 + Details
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