Segment Information - Summary of Financial Data for Company's Reportable Business Segments (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 28, 2015
Mar. 29, 2014
Dec. 27, 2014
Dec. 28, 2013
Dec. 29, 2012
Segment Reporting Information [Line Items]          
Total revenue $ 193,987 $ 151,091 $ 1,204,231 $ 916,201 $ 926,254
Total capital expenditures 17,708 19,941 76,162 65,999 45,488
Income (loss) from continuing operations before taxes (84,305) (53,644) (13,336) (105,798) (50,951)
Interest expense 24,109 18,819 86,742 56,443 58,079
Depreciation, depletion, amortization and accretion 26,126 19,356 87,826 72,934 68,290
Total assets 2,018,254   1,729,777 1,251,060 1,284,479
Goodwill impairment       68,202  
Loss on debt financings 799     3,115 9,469
West Region [Member]          
Segment Reporting Information [Line Items]          
Goodwill impairment       53,264  
East Region [Member]          
Segment Reporting Information [Line Items]          
Goodwill impairment       14,938  
Operating Segments [Member]          
Segment Reporting Information [Line Items]          
Total capital expenditures 16,817 18,784 71,629 62,639 44,725
Depreciation, depletion, amortization and accretion 25,637 19,051 86,358 72,468 68,209
Total assets 1,684,802   1,703,713 1,233,451 1,262,721
Operating Segments [Member] | Aggregates [Member]          
Segment Reporting Information [Line Items]          
Total revenue 52,337 31,550 229,047 159,019 146,991
Operating Segments [Member] | Cement [Member]          
Segment Reporting Information [Line Items]          
Total revenue 11,819 7,707 89,911 76,211 77,676
Operating Segments [Member] | Ready Mixed Concrete [Member]          
Segment Reporting Information [Line Items]          
Total revenue 70,088 42,380 274,970 112,878 100,941
Operating Segments [Member] | Asphalt [Member]          
Segment Reporting Information [Line Items]          
Total revenue 20,914 24,396 278,867 219,811 242,458
Operating Segments [Member] | Paving And Related Services [Member]          
Segment Reporting Information [Line Items]          
Total revenue 43,899 55,857 528,817 478,280 505,189
Operating Segments [Member] | West Region [Member]          
Segment Reporting Information [Line Items]          
Total revenue 127,674 94,894 665,716 426,195 484,922
Total capital expenditures 5,419 4,138 31,968 21,856 14,993
Income (loss) from continuing operations before taxes 11,869 1,791 96,133 28,607 14,429
Depreciation, depletion, amortization and accretion 12,088 6,747 33,271 24,167 23,771
Total assets 760,881   777,981 383,544 428,115
Operating Segments [Member] | Central Region [Member]          
Segment Reporting Information [Line Items]          
Total revenue 56,609 47,542 391,553 329,621 302,113
Total capital expenditures 8,624 12,401 32,114 33,030 20,996
Income (loss) from continuing operations before taxes 710 (423) 83,912 72,918 65,767
Depreciation, depletion, amortization and accretion 10,072 8,847 38,793 33,808 30,215
Total assets 704,314   704,134 657,421 610,003
Operating Segments [Member] | East Region [Member]          
Segment Reporting Information [Line Items]          
Total revenue 9,704 8,655 146,962 160,385 139,219
Total capital expenditures 2,774 2,245 7,547 7,753 8,736
Income (loss) from continuing operations before taxes (7,867) (9,338) 17,955 15,134 10,782
Depreciation, depletion, amortization and accretion 3,477 3,457 14,294 14,493 14,223
Total assets 219,607   221,598 192,486 224,603
Corporate and Other [Member]          
Segment Reporting Information [Line Items]          
Total capital expenditures 891 1,157 4,533 3,360 763
Income (loss) from continuing operations before taxes (9,687) (7,499) (36,768) (24,878) (15,560)
Depreciation, depletion, amortization and accretion 489 305 1,468 466 81
Total assets 333,452   26,064 17,609 21,758
Operating Segment and Corporate and Other [Member]          
Segment Reporting Information [Line Items]          
Income (loss) from continuing operations before taxes (4,975) (15,469) 161,232 91,781 75,418
Segment Reconciling Items [Member]          
Segment Reporting Information [Line Items]          
Interest expense 24,109 18,819 86,742 56,443 58,079
Depreciation, depletion, amortization and accretion 26,126 19,356 87,826 72,934 68,290
Initial public offering costs 28,296        
Goodwill impairment       68,202  
Loss on debt financings 799        
Intersegment Eliminations [Member]          
Segment Reporting Information [Line Items]          
Total revenue $ (5,070) $ (10,799) $ (197,381) $ (129,998) $ (147,001)