Consolidated Statements of Changes in Redeemable Noncontrolling Interest and Partners' Interest /Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Class A [Member]
Common Class B [Member]
Class A Units [Member]
Class B Units [Member]
Class C Units [Member]
Class D Units [Member]
Summit Holdings [Member]
Partners Interest [Member]
Summit Holdings [Member]
Noncontrolling Interest [Member]
Noncontrolling Interest [Member]
Summit Materials, LLC [Member]
Accumulated Deficit [Member]
Accumulated Other Comprehensive Loss (AOCI) [Member]
Additional Paid-in Capital [Member]
Additional Paid-in Capital [Member]
Common Class A [Member]
Additional Paid-in Capital [Member]
Common Class B [Member]
Redeemable Noncontrolling Interest [Member]
Member Units [Member]
Class A Units [Member]
Member Units [Member]
Class B Units [Member]
Member Units [Member]
Class C Units [Member]
Member Units [Member]
Class D Units [Member]
Parent Including Portion Attributable to Non Redeemable Noncontrolling Interest [Member]
Beginning Balance at Dec. 31, 2011                   $ 1,174   $ (40,932) $ (6,577) $ 3,463       $ 463,510 $ 19,000     $ 439,638
Beginning Balance at Dec. 31, 2011                                 $ 21,300          
Beginning Balance (Units) at Dec. 31, 2011                                   31,305 1,220 372 8,495  
Accretion/ redemption value adjustment                                 657          
Net (loss) income $ (52,496)                               1,988          
Accretion/ redemption value adjustment                       (657)                   (657)
Issuance (redemption) of Class C and Class D Interests                                       (9) 70  
Net (loss) income (50,577)                 (69)   (52,496)                   (52,565)
Other comprehensive income (3,648)                       (2,553)       (1,095)         (2,553)
Repurchase of partners' interest                           (156)       $ (500)       (656)
Repurchase of partners' interest (Units)                                   (44)        
Share-based compensation 2,533                         2,533               2,533
Payment of Dividends                   (46)                       (46)
Ending Balance at Dec. 29, 2012                   1,059   (94,085) (9,130) 5,840       $ 463,010 $ 19,000     385,694
Ending Balance at Dec. 29, 2012                                 22,850          
Ending Balance (Units) at Dec. 29, 2012                                   31,261 1,220 363 8,565  
Accretion/ redemption value adjustment                                 (2,365)          
Net (loss) income (106,791)                               2,960          
Accretion/ redemption value adjustment                       2,365                   2,365
Issuance (redemption) of Class C and Class D Interests                                         1,324  
Net (loss) income (103,679)                 152   (106,791)                   (106,639)
Other comprehensive income 4,407                       3,085       1,322         3,085
Repurchase of partners' interest                           (3)               (3)
Share-based compensation 2,315                         2,315               2,315
Ending Balance at Dec. 28, 2013 286,817               $ 285,606 1,211 $ 1,211 (198,511) (6,045) 8,152       $ 463,010 $ 19,000     286,817
Ending Balance at Dec. 28, 2013 24,767                               24,767          
Ending Balance (Units) at Dec. 28, 2013       31,261 1,220 363 9,889                     31,261 1,220 363 9,889  
Contributed capital 24,350               24,350                          
Accretion/ redemption value adjustment (2,571)               (2,571)               2,571          
Net (loss) income               $ (50,553)                            
Net (loss) income (53,068)               (50,553)   (69)           (2,446)          
Other comprehensive income 818               573               245          
Share-based compensation 566               566                          
Ending Balance at Mar. 29, 2014 259,113               257,971   1,142                      
Ending Balance at Mar. 29, 2014                                 25,137          
Beginning Balance at Dec. 28, 2013 286,817               285,606 1,211 1,211 (198,511) (6,045) 8,152       $ 463,010 $ 19,000     286,817
Beginning Balance at Dec. 28, 2013 24,767                               24,767          
Beginning Balance (Units) at Dec. 28, 2013       31,261 1,220 363 9,889                     31,261 1,220 363 9,889  
Contributed capital                                   $ 3,600 $ 20,751     24,351
Contributed capital (Unit)                                   241 1,387      
Accretion/ redemption value adjustment                                 8,145          
Net (loss) income (8,777)                               2,408          
Accretion/ redemption value adjustment                       (8,145)                   (8,145)
Issuance (redemption) of Class C and Class D Interests                                       18 (411)  
Net (loss) income (6,282)                 87   (8,777)                   (8,690)
Other comprehensive income (11,081)                       (9,501)       (1,580)         (9,501)
Repurchase of partners' interest                           (88)               (88)
Share-based compensation 2,235                     (1,983)   4,222               2,239
Ending Balance at Dec. 27, 2014 286,983               285,685   1,298                      
Ending Balance at Dec. 27, 2014 286,983                 1,298   (217,416) (15,546) 12,286       $ 466,610 $ 39,751     286,983
Ending Balance at Dec. 27, 2014 33,740                               33,740          
Ending Balance (Units) at Dec. 27, 2014       31,502 2,607 381 9,478                     31,502 2,607 381 9,478  
Accretion/ redemption value adjustment (32,252)               (32,252)               32,252          
Net (loss) income (41,415)               (41,338)   (77)           (1,890)          
Other comprehensive income (5,249)               (5,249)                          
Share-based compensation 424               424                          
Ending Balance at Mar. 11, 2015 208,491               207,270   1,221                      
Ending Balance at Mar. 11, 2015                                 64,102          
Beginning Balance at Dec. 27, 2014 286,983                 1,298   (217,416) (15,546) 12,286       $ 466,610 $ 39,751     $ 286,983
Beginning Balance at Dec. 27, 2014 33,740                               33,740          
Beginning Balance at Dec. 27, 2014 286,983               285,685   1,298                      
Beginning Balance (Units) at Dec. 27, 2014       31,502 2,607 381 9,478                     31,502 2,607 381 9,478  
Net (loss) income (10,151)             $ (67,704)                            
Issuance (redemption) of Class C and Class D Interests   25,555,555                                        
Net (loss) income (79,837)                                          
Other comprehensive income (6,299)                                          
Share-based compensation 15,217                                          
Ending Balance at Mar. 28, 2015 628,271 $ 266 $ 690             180,904 1,206 (10,151) (1,050) 456,406                
Ending Balance, Shares at Mar. 28, 2015   26,584,738 69,007,297                                      
Recording of noncontrolling interest upon reorganization                 (207,270) 207,270                        
Beginning Balance at Mar. 11, 2015 208,491               $ 207,270   1,221                      
Issuance of common stock, Values 424,044 $ 256 $ 690                       $ 423,788 $ (690)            
Issuance (redemption) of Class C and Class D Interests   25,555,555 69,007,397                                      
Net (loss) income (36,532)                 (26,366) (15) (10,151)                    
Other comprehensive income (1,050)                       (1,050)                  
Repurchase of partners' interest (Units)     (100)                                      
Purchase of redeemable noncontrolling interest 18,525 $ 10                       18,515     $ (64,102)          
Purchase of redeemable noncontrolling interest, Shares   1,029,183                                        
Share-based compensation 14,793                         14,793                
Ending Balance at Mar. 28, 2015 $ 628,271 $ 266 $ 690             $ 180,904 $ 1,206 $ (10,151) $ (1,050) $ 456,406                
Ending Balance, Shares at Mar. 28, 2015   26,584,738 69,007,297