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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, 2013
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Sep. 30, 2012
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Sep. 30, 2013
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Sep. 30, 2012
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Dec. 31, 2012
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Sep. 30, 2013
2012 Equity Incentive Plan
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Nov. 02, 2012
2012 Equity Incentive Plan
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Sep. 30, 2013
Performance Units
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Sep. 30, 2012
Performance Units
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Sep. 30, 2013
Performance Units
|
Sep. 30, 2012
Performance Units
|
Sep. 30, 2013
Deferred Equity Units
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Sep. 30, 2012
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 | $ 431 | $ 444 | $ 1,468 | $ 1,251 | $ 51 | $ 69 | $ 189 | $ 170 | |||||
| Cash distributions on awards | 2 | 7 | 13 | 21 | |||||||||
| Vested awards settled in cash | 261 | 63 | |||||||||||
| Unrecognized compensation expense related to unvested awards | $ 1,602 | $ 1,602 | $ 1,428 | ||||||||||
| Recognition period of unrecognized compensation expense related to unvested awards | 1 year 4 months 28 days | 2 years 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 | 1,687,500 | |||||||||||
| Common stock shares issued | 16,540 | ||||||||||||