v3.2.0.727
Equity-Based Compensation (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 5 Months Ended 6 Months Ended
Feb. 04, 2015
Feb. 03, 2015
Jul. 01, 2015
Jun. 25, 2014
Jul. 01, 2015
Jul. 01, 2015
Jun. 25, 2014
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Equity-based compensation expense     $ 1,178 $ 42   $ 14,337 $ 83  
LLC interests                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
IPO qualifying transaction price (in USD per share)           $ 715.02    
Unit appreciation rights                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Equity-based compensation expense     0 0   $ 11,762 0  
Restricted Class B units                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Equity-based compensation expense     0 42   $ 605 83  
Restricted class B units vested           7,227    
Restricted class B units weighted average grant date fair value vested (in USD per share)           $ 92.31    
Fair value of restricted Class B units vested in the period           $ 667    
Stock options                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Equity-based compensation expense     $ 1,178 $ 0   $ 1,970 $ 0  
Minimum | Restricted Class B units                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Award vesting period   3 years            
Maximum | Restricted Class B units                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Award vesting period   5 years            
2015 Incentive Award Plan                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Number of shares available for grant     5,865,522   5,865,522 5,865,522    
Stock options granted in the period           2,622,281    
2015 Incentive Award Plan | Stock options                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Weighted average exercise price for stock options granted (in USD per share)           $ 21.00    
2015 Incentive Award Plan | Minimum | Stock options                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Award vesting period           1 year    
2015 Incentive Award Plan | Maximum | Stock options                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Award vesting period           5 years    
Common stock | Class A Common Stock                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Issuance of class A common stock in settlement of unit appreciation rights (shares) 339,306       339,306 339,306    
Pro forma | LLC interests                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Restricted class B units vested           158,251    
Restricted class B units weighted average grant date fair value vested (in USD per share)           $ 4.22    
Unit Appreciation Rights Plan | Unit appreciation rights                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Number of shares available for grant   31,303            
Contractual term   10 years            
Unit appreciation rights vested and settled           22,554    
Weighted average base price of unit appreciation rights vested and settled           $ 193.51    
Unit Appreciation Rights Plan | Pro forma | LLC interests                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Unit appreciation rights vested and settled           767,947    
Weighted average base price of unit appreciation rights vested and settled           $ 5.68    
2015 Incentive Award Plan                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stock options granted in the period           2,622,281    
Weighted average exercise price for stock options granted (in USD per share)           $ 21.00    
Weighted average grant date fair value of stock options (in USD per share)           $ 8.53    
Stock options outstanding     2,600,281   2,600,281 2,600,281   0
Stock options exercisable     0   0 0    
Unrecognized compensation expense (USD)     $ 20,281   $ 20,281 $ 20,281    
2015 Incentive Award Plan | Stock options                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Weighted-average period for recognition compensation expense           4 years 6 months