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Equity-Based Compensation - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified |
3 Months Ended | 9 Months Ended | 12 Months Ended | 3 Months Ended | 9 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2014
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Sep. 30, 2013
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Sep. 30, 2014
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Sep. 30, 2013
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Dec. 31, 2013
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Sep. 30, 2014
2012 Equity Incentive Plan
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Nov. 02, 2012
2012 Equity Incentive Plan
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Sep. 30, 2014
Performance Shares
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Sep. 30, 2013
Performance Shares
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Sep. 30, 2014
Performance Shares
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Sep. 30, 2013
Performance Shares
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Sep. 30, 2014
Deferred Equity Units
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Sep. 30, 2013
Deferred Equity Units
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | |||||||||||||
| Equity program, description | The Deferred Equity Unit represents the unsecured right to receive one unit of SLP or the equivalent cash value of up to 50% (or such other percentage as may be determined by the Company’s Executive Committee) of SLP’s units issuable upon the vesting of any such Deferred Equity Units and the remaining 50% in units upon the vesting of any such Deferred Equity Units. | ||||||||||||
| Performance Unit, description | The Performance Unit represents the unsecured right to receive one unit of SLP for every two units of SLP issuable upon the vesting of any such Deferred Equity Units. | ||||||||||||
| Compensation expense | $ 74 | $ 431 | $ 848 | $ 1,468 | $ 22 | $ 51 | $ 87 | $ 189 | |||||
| Cash distributions on awards | 0 | 1 | 2 | 7 | |||||||||
| Vested awards settled in cash | 30 | 261 | |||||||||||
| Unrecognized compensation expense related to unvested awards | $ 297 | $ 297 | $ 906 | ||||||||||
| Recognition period of unrecognized compensation expense related to unvested awards | 7 months 6 days | 1 year 1 month 28 days | |||||||||||
| Distribution of partnership units for each limited partnership unit prior to the consummation of the IPO | 19.64 | ||||||||||||
| Estimated percentage of awards to be forfeited | 10.00% | ||||||||||||
| Estimated service period | 4 years | ||||||||||||
| Shares reserved for issuance | 1,670,960 | ||||||||||||
| Shares reserved for issuance, authorized | 1,687,500 | ||||||||||||