Quarterly report pursuant to Section 13 or 15(d)

Equity-Based Compensation - Additional Information (Detail)

v2.4.0.8
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
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Jun. 30, 2014
2012 Equity Incentive Plan
Nov. 02, 2012
2012 Equity Incentive Plan
Jun. 30, 2014
Performance Shares
Jun. 30, 2013
Performance Shares
Jun. 30, 2014
Performance Shares
Jun. 30, 2013
Performance Shares
Jun. 30, 2014
Deferred Equity Units
Jun. 30, 2013
Deferred Equity Units
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 $ 260 $ 405 $ 774 $ 1,024       $ 23 $ 84 $ 65 $ 138    
Cash distributions on awards 0 1 4 11                  
Vested awards settled in cash                       30 261
Unrecognized compensation expense related to unvested awards $ 511   $ 511   $ 906                
Recognition period of unrecognized compensation expense related to unvested awards     1 year   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