Quarterly report pursuant to Section 13 or 15(d)

Equity-Based Compensation - Additional Information (Detail)

v3.4.0.3
Equity-Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Aug. 31, 2015
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Sep. 30, 2015
Dec. 31, 2014
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   $ 772 $ 115        
Unrecognized compensation expense related to unvested awards   $ 0   $ 21      
Recognition period of unrecognized compensation expense related to unvested awards   0 years   1 month 17 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 per unit $ 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   $ 14 115        
Vested awards settled in cash   0 0        
Performance Units              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Compensation expense   (32) $ 16        
Reversed compensation expense   33          
Fair Value per unit     $ 3.75 $ 3.75   $ 3.75  
Performance Units | Deferred Compensation Share Based Payments              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Compensation expense   1 $ 16        
Restricted Stock Units              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Compensation expense   791          
Unrecognized compensation expense related to unvested awards   $ 10,592          
Recognition period of unrecognized compensation expense related to unvested awards   3 years 4 months 6 days          
Fair Value per unit   $ 13.23   $ 13.23