Consolidated Statements of Operations - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 28, 2015
Mar. 29, 2014
Dec. 27, 2014
Dec. 28, 2013
Dec. 29, 2012
Revenue:          
Product $ 148,920 $ 100,168 $ 838,026 $ 593,570 $ 588,762
Service 26,219 35,851 366,205 322,631 337,492
Net revenue 175,139 136,019 1,204,231 916,201 926,254
Delivery and subcontract revenue 18,848 15,072      
Total revenue 193,987 151,091 1,204,231 916,201 926,254
Cost of revenue (excluding items shown separately below):          
Product 119,791 84,477 598,732 430,172 444,569
Service 19,630 29,126 288,428 246,880 268,777
Net cost of revenue 139,421 113,603 887,160 677,052 713,346
Delivery and subcontract cost 18,848 15,072      
Total cost of revenue 158,269 128,675      
General and administrative expenses 67,234 35,488 150,732 142,000 127,215
Goodwill impairment       68,202  
Depreciation, depletion, amortization and accretion 26,126 19,356 87,826 72,934 68,290
Transaction costs 1,364 2,591 8,554 3,990 1,988
Operating (loss) income (59,006) (35,019) 69,959 (47,977) 15,415
Other expense (income), net 391 (194) (3,447) (1,737) (1,182)
Loss on debt financings 799     3,115 9,469
Interest expense 24,109 18,819 86,742 56,443 58,079
(Loss) income from continuing operations before taxes (84,305) (53,644) (13,336) (105,798) (50,951)
Income tax benefit (4,468) (596) (6,983) (2,647) (3,920)
Loss from continuing operations (79,837) (53,048) (6,353) (103,151) (47,031)
Loss from discontinued operations   20 (71) 528 3,546
Net loss (79,837) (53,068) (6,282) (103,679) (50,577)
Net income attributable to noncontrolling interest (1,982) (2,515) 2,495 3,112 1,919
Net loss (10,151)   $ (8,777) $ (106,791) $ (52,496)
Summit Holdings [Member]          
Cost of revenue (excluding items shown separately below):          
Net loss $ (67,704) $ (50,553)      
Common Class A [Member]          
Net loss per share of Class A common stock:          
Basic $ (0.38)        
Diluted $ (0.38)        
Weighted average shares of Class A common stock:          
Basic 26,584,738        
Diluted 26,584,738