Consolidated Balance Sheets - USD ($)
$ in Thousands
Mar. 28, 2015
Dec. 27, 2014
Dec. 28, 2013
Current assets:      
Cash $ 314,980 $ 13,215 $ 18,184
Accounts receivable, net 109,941 141,302 99,337
Costs and estimated earnings in excess of billings 11,836 10,174 10,767
Inventories 133,307 111,553 96,432
Other current assets 17,476 17,172 13,181
Total current assets 587,540 293,416 237,900
Property, plant and equipment, net 948,129 950,601 831,778
Goodwill 415,582 419,270 127,038
Intangible assets, net 16,891 17,647 15,147
Other assets 50,112 48,843 39,197
Total assets 2,018,254 1,729,777 1,251,060
Current liabilities:      
Current portion of debt 5,275 5,275 30,220
Current portion of acquisition-related liabilities 24,851 18,402 10,635
Accounts payable 70,840 78,854 72,104
Accrued expenses 81,612 101,496 57,251
Billings in excess of costs and estimated earnings 8,309 8,958 9,263
Total current liabilities 190,887 212,985 179,473
Long-term debt 1,057,418 1,059,642 658,767
Acquisition-related liabilities 44,245 42,736 23,756
Other noncurrent liabilities 97,433 93,691 77,480
Total liabilities $ 1,389,983 $ 1,409,054 939,476
Commitments and contingencies      
Redeemable noncontrolling interest   $ 33,740 24,767
Partners' interest:      
Partners' interest   285,685 285,606
Additional paid in capital $ 456,406 12,286 8,152
Accumulated deficit (10,151) (217,416) (198,511)
Accumulated other comprehensive loss (1,050) (15,546) (6,045)
Stockholders' equity/partners' interest: 446,161 285,685  
Noncontrolling interest 1,206 1,298 1,211
Noncontrolling interest in Summit Inc. 180,904    
Total partners' interest   286,983 286,817
Total stockholders' equity/partners' interest 628,271 286,983  
Total liabilities, redeemable noncontrolling interest and partners' interest 2,018,254 1,729,777 1,251,060
Class A Units [Member]      
Partners' interest:      
Members' Capital   466,610 463,010
Class B Units [Member]      
Partners' interest:      
Members' Capital   $ 39,751 $ 19,000
Common Class A [Member]      
Partners' interest:      
Common stock 266    
Total stockholders' equity/partners' interest 266    
Common Class B [Member]      
Partners' interest:      
Common stock 690    
Total stockholders' equity/partners' interest $ 690