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Equity-Based Compensation - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified |
3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Jun. 30, 2013
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Jun. 30, 2012
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Jun. 30, 2013
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Jun. 30, 2012
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Dec. 31, 2012
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Nov. 02, 2012
2012 Equity Incentive Plan [Member]
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Jun. 30, 2013
Performance Units [Member]
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Jun. 30, 2012
Performance Units [Member]
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Jun. 30, 2013
Performance Units [Member]
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Jun. 30, 2012
Performance Units [Member]
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Jun. 30, 2013
Deferred Equity Units [Member]
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Jun. 30, 2012
Deferred Equity Units [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||
| Equity program, description | Each 100 Deferred Equity Units represent the unsecured right to receive 100 units of SLP. 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 | $ 404 | $ 338 | $ 1,024 | $ 763 | $ 84 | $ 53 | $ 138 | $ 101 | ||||
| Cash distributions on awards | 4 | 7 | 11 | 13 | ||||||||
| Vested awards settled in cash | 261 | 63 | ||||||||||
| Unrecognized compensation expense related to unvested awards | $ 1,670 | $ 1,670 | $ 1,428 | |||||||||
| Recognition period of unrecognized compensation expense related to unvested awards | 1 year 8 months 1 day | 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 | 1,687,500 | |||||||||||
| Shares available for issuance | 1,687,500 | |||||||||||