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Financial Information Related to Operations by Segment (Detail)
 3 Months Ended 12 Months Ended
Mar. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Sep. 30, 2018
USD ($)
Jun. 30, 2018
USD ($)
Mar. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Sep. 30, 2017
USD ($)
Jun. 30, 2017
USD ($)
Mar. 31, 2019
USD ($)
kT
Mar. 31, 2018
USD ($)
kT
Mar. 31, 2017
USD ($)
kT
Segment Reporting Information [Line Items]                      
Revenue $ 284,701,000 $ 333,285,000 $ 381,499,000 $ 393,756,000 $ 284,713,000 $ 359,371,000 $ 376,315,000 $ 366,121,000 $ 1,393,241,000 $ 1,386,520,000 $ 1,211,220,000
Less: Joint Venture Revenue                 (104,493,000) (105,884,000) (105,916,000)
Operating Earnings                 365,133,000 382,175,000 354,431,000
Corporate General and Administrative Expense                 (37,371,000) (41,205,000) (33,940,000)
Impairment Losses                 (220,265,000) 0 0
Litigation Settlements and Losses                 (1,800,000) (45,098,000)  
Other Non-Operating Income                 2,412,000 3,728,000 2,139,000
Acquisition and Litigation Expense                     (5,480,000)
Earnings Before Interest and Income Taxes                 108,109,000 299,600,000 317,150,000
Interest Expense, Net                 (28,374,000) (27,638,000) (22,631,000)
Earnings Before Income Taxes (171,597,000) $ 74,518,000 $ 91,793,000 $ 85,021,000 48,725,000 $ 51,388,000 $ 92,319,000 $ 79,530,000 79,735,000 271,962,000 294,519,000
Capital Expenditures                 168,873,000 131,957,000 56,938,000
Depreciation, Depletion and Amortization                 122,535,000 114,015,000 91,791,000
Identifiable Assets 2,169,163,000       2,368,003,000       2,169,163,000 2,368,003,000 2,247,124,000
Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue                 1,580,287,000 1,580,528,000 1,396,252,000
Intersegment Eliminations [Member]                      
Segment Reporting Information [Line Items]                      
Revenue                 (82,553,000) (88,124,000) (79,116,000)
Other [Member]                      
Segment Reporting Information [Line Items]                      
Capital Expenditures                 6,107,000 461,000 697,000
Identifiable Assets 37,434,000       60,962,000       37,434,000 60,962,000 22,018,000
Cement [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue                 $ 656,759,000 $ 651,750,000 $ 566,321,000
Cement Sales Volume | kT                 5,340 5,365 4,871
Operating Earnings                 $ 164,782,000 $ 179,151,000 $ 153,525,000
Capital Expenditures                 76,504,000 45,088,000 32,790,000
Depreciation, Depletion and Amortization                 52,802,000 50,891,000 36,727,000
Identifiable Assets 1,289,468,000       1,247,504,000       $ 1,289,468,000 $ 1,247,504,000 $ 1,234,617,000
Cement [Member] | Operating Segments [Member] | Wholly-Owned [Member]                      
Segment Reporting Information [Line Items]                      
Cement Sales Volume | kT                 4,441 4,453 3,934
Operating Earnings                 $ 126,217,000 $ 135,732,000 $ 111,139,000
Cement [Member] | Operating Segments [Member] | Joint Venture [Member]                      
Segment Reporting Information [Line Items]                      
Cement Sales Volume | kT                 899 912 937
Operating Earnings                 $ 38,565,000 $ 43,419,000 $ 42,386,000
Cement [Member] | Intersegment Eliminations [Member]                      
Segment Reporting Information [Line Items]                      
Revenue                 (14,408,000) (16,442,000) (15,781,000)
Concrete and Aggregates [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue                 140,173,000 157,013,000 154,592,000
Operating Earnings                 12,866,000 17,854,000 18,072,000
Capital Expenditures                 6,649,000 4,977,000 6,528,000
Depreciation, Depletion and Amortization                 8,176,000 7,931,000 7,931,000
Identifiable Assets 95,084,000       104,851,000       95,084,000 104,851,000 110,413,000
Concrete and Aggregates [Member] | Intersegment Eliminations [Member]                      
Segment Reporting Information [Line Items]                      
Revenue                 (1,422,000) (1,335,000) (1,262,000)
Gypsum Wallboard [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue                 532,712,000 491,779,000 473,651,000
Operating Earnings                 180,831,000 158,551,000 159,866,000
Capital Expenditures                 10,724,000 19,382,000 11,393,000
Depreciation, Depletion and Amortization                 20,020,000 18,179,000 18,728,000
Identifiable Assets 372,206,000       386,041,000       372,206,000 386,041,000 379,414,000
Paperboard [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue                 167,656,000 181,742,000 167,065,000
Operating Earnings                 35,349,000 32,758,000 37,601,000
Capital Expenditures                 16,603,000 5,177,000 3,996,000
Depreciation, Depletion and Amortization                 8,541,000 8,694,000 8,425,000
Identifiable Assets 138,614,000       123,819,000       138,614,000 123,819,000 124,356,000
Paperboard [Member] | Intersegment Eliminations [Member]                      
Segment Reporting Information [Line Items]                      
Revenue                 (66,723,000) (70,347,000) (62,073,000)
Oil and Gas Proppants [Member]                      
Segment Reporting Information [Line Items]                      
Impairment Losses (220,300,000)                    
Oil and Gas Proppants [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue                 82,987,000 98,244,000 34,623,000
Operating Earnings                 (28,695,000) (6,139,000) (14,633,000)
Capital Expenditures                 52,286,000 56,872,000 1,534,000
Depreciation, Depletion and Amortization                 31,328,000 26,872,000 18,255,000
Identifiable Assets $ 236,357,000       $ 444,826,000       236,357,000 444,826,000 376,306,000
Corporate and Other [Member]                      
Segment Reporting Information [Line Items]                      
Depreciation, Depletion and Amortization                 $ 1,668,000 $ 1,448,000 $ 1,725,000