Annual report pursuant to Section 13 and 15(d)

Equity-Based Compensation - Additional Information (Detail)

v3.3.1.900
Equity-Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 12 Months Ended
Aug. 31, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Nov. 02, 2012
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   $ 1,524 $ 1,043      
Cash distributions on awards   0 1 $ 13    
Unrecognized compensation expense related to unvested awards   $ 21 $ 168      
Recognition period of unrecognized compensation expense related to unvested awards   1 month 17 days 7 months 24 days      
Estimated percentage of awards to be forfeited   10.00%        
Estimated service period   4 years        
2012 Equity Incentive Plan            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Shares reserved for issuance   704,450        
Shares reserved for issuance, authorized           1,687,500
Restricted stock units granted description   Twenty-five percent of the restricted stock units granted vest and settle on each of the first, second, third and fourth anniversaries of the grant date.        
Restricted stock units granted 966,510          
Fair value granted restricted stock unit per share $ 13.23          
2012 Equity Incentive Plan | First Anniversary            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Restricted stock, vesting percentage 25.00%          
2012 Equity Incentive Plan | Second Anniversary            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Restricted stock, vesting percentage 25.00%          
2012 Equity Incentive Plan | Third Anniversary            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Restricted stock, vesting percentage 25.00%          
2012 Equity Incentive Plan | Fourth Anniversary            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Restricted stock, vesting percentage 25.00%          
Deferred Compensation Share Based Payments            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Compensation expense   $ 248 $ 1,043 2,222    
Vested awards settled in cash   0 30 $ 260    
Performance Units            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Compensation expense   $ 81 $ 109      
Fair value granted restricted stock unit per share   $ 3.75 $ 3.75 $ 3.75 $ 3.27  
Performance Units | Deferred Compensation Share Based Payments            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Compensation expense   $ 81 $ 109 $ 245    
Restricted Stock Units            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Compensation expense   1,276        
Unrecognized compensation expense related to unvested awards   $ 11,383        
Recognition period of unrecognized compensation expense related to unvested awards   3 years 7 months 6 days        
Restricted stock units granted   966,510        
Fair value granted restricted stock unit per share   $ 13.23