| Accounting Policies [Abstract] | Period [Axis] |
|---|
2016-01-01 - 2016-12-31 |
|---|
Accounting Policies [Abstract] | |
Summary of Changes in Allowance for Doubtful Accounts | The changes in the allowance for doubtful accounts, included on the consolidated balance sheets as an offset to “Accounts receivable,” for the three years ended December 31, 2016 were as follows (in millions): | | | | | | | | | | Balance at
Beginning of Year | | Provision for bad debt | | Write-offs
and Other | | Balance at
End of Year | 2016 | $1.7 | | $0.8 | | $(1.5) | | $1.0 | 2015 | $1.7 | | $0.4 | | $(0.4) | | $1.7 | 2014 | $1.3 | | $0.8 | | $(0.4) | | $1.7 |
|
Schedule of Inventories | Inventories at December 31, 2016 and 2015 were as follows (in millions): | | | | | | | | | | 2016 | | 2015 | Sugar inventories | $ | 17.5 |
| | $ | 16.3 |
| Asphalt | 7.4 |
| | 12.8 |
| Processed rock, Portland cement, and sand | 12.6 |
| | 12.2 |
| Work in progress | 3.0 |
| | 3.7 |
| Retail merchandise | 1.7 |
| | 1.6 |
| Parts, materials and supplies inventories | 1.1 |
| | 9.3 |
| Total | $ | 43.3 |
| | $ | 55.9 |
|
|
Schedule of Estimated Useful Lives of Property | Estimated useful lives of property are as follows: | | | Classification | Range of Life (in years) | Buildings | 10 to 40 | Water, power and sewer systems | 5 to 50 | Rock crushing and asphalt plants | 25 to 35 | Machinery and equipment | 2 to 35 | Other property improvements | 3 to 35 |
|
Schedule of Intangible Assets Acquired | Intangible assets acquired in 2016 and 2015 were as follows: | | | | | | | | | | | | | | 2016 | | 2015 | | Amount | | Weighted Average Life (Years) | | Amount | | Weighted Average Life (Years) | Amortized intangible assets: | | | | | | | | In-place/favorable leases | $ | 8.5 |
| | 7.0 | | $ | 1.0 |
| | 2.6 |
|
Schedule of Intangible Assets | Intangible assets for the years ended December 31, included the following (in millions): | | | | | | | | | | 2016 | | 2015 | Amortized intangible assets: | | | | In-place leases | $ | 69.9 |
| | $ | 62.6 |
| Favorable leases | 17.9 |
| | 16.6 |
| Permitted quarry rights | 18.0 |
| | 18.0 |
| Contract backlog | 2.6 |
| | 2.6 |
| Trade name/customer relationships | 2.2 |
| | 2.2 |
| Accumulated amortization | (56.8 | ) | | (47.6 | ) | Total assets | $ | 53.8 |
| | $ | 54.4 |
|
|
Schedule of Estimated Amortization Expenses Related to Intangible Assets | Estimated amortization expenses related to intangible assets over the next five years are as follows (in millions): | | | | | | Estimated
Amortization | 2017 | $ | 7.5 |
| 2018 | $ | 6.2 |
| 2019 | $ | 5.2 |
| 2020 | $ | 4.0 |
| 2021 | $ | 3.4 |
|
|
Schedule of Changes in the Carrying Amount of Goodwill | The changes in the carrying amount of goodwill allocated to the Company's reportable segments for the years ended December 31, 2016 and 2015 were as follows (in millions): | | | | | | | | | | | | | | Materials & Construction | | Commercial Real Estate | | Total | Balance, January 1, 2015 | $ | 93.6 |
| | $ | 8.7 |
| | $ | 102.3 |
| Changes to goodwill | — |
| | — |
| | — |
| Balance, December 31, 2015 | 93.6 |
| | 8.7 |
| | 102.3 |
| Changes to goodwill | — |
| | — |
| | — |
| Balance, December 31, 2016 | $ | 93.6 |
| | $ | 8.7 |
| | $ | 102.3 |
|
|
Schedule of Components of Accumulated Other Comprehensive Loss, Net of Taxes | The components of accumulated other comprehensive loss, net of taxes, were as follows for the years ended December 31 (in millions): | | | | | | | | | | 2016 | | 2015 | Unrealized components of benefit plans: | | | | Pension plans | $ | (43.8 | ) | | $ | (44.7 | ) | Post-retirement plans | (0.6 | ) | | (0.6 | ) | Non-qualified benefit plans | (0.6 | ) | | — |
| Interest rate swap | 1.8 |
| | — |
| Accumulated other comprehensive loss | $ | (43.2 | ) | | $ | (45.3 | ) |
The changes in accumulated other comprehensive loss by component for the years ended December 31, were as follows (in millions, net of tax): | | | | | | | | | | | | |
| Employee
Benefit Plans |
| Interest Rate Swap |
| Total | Balance, January 1, 2014 | $ | (30.1 | ) |
| $ | — |
|
| $ | (30.1 | ) | Other comprehensive loss before reclassifications, net of taxes of $10.4 for employee benefit plans | (16.3 | ) |
| — |
|
| (16.3 | ) | Amounts reclassified from accumulated other comprehensive loss, net of taxes of $1.2 for employee benefit plans | 2.0 |
|
| — |
|
| 2.0 |
| Balance, December 31, 2014 | $ | (44.4 | ) |
| $ | — |
|
| $ | (44.4 | ) | Other comprehensive loss before reclassifications, net of taxes of $2.9 for employee benefit plans | (4.6 | ) |
| — |
|
| (4.6 | ) | Amounts reclassified from accumulated other comprehensive loss, net of taxes of $2.3 for employee benefit plans | 3.7 |
|
| — |
|
| 3.7 |
| Balance, December 31, 2015 | $ | (45.3 | ) |
| $ | — |
|
| $ | (45.3 | ) | Other comprehensive loss before reclassifications, net of taxes of $2.1 and $1.0 for employee benefit plans and interest rate swap, respectively | (3.4 | ) |
| 1.6 |
|
| (1.8 | ) | Amounts reclassified from accumulated other comprehensive loss, net of taxes of $2.3 and $0.2 for employee benefit plans and interest rate swap, respectively | 3.7 |
|
| 0.2 |
|
| 3.9 |
| Balance, December 31, 2016 | $ | (45.0 | ) |
| $ | 1.8 |
|
| $ | (43.2 | ) |
|
Schedule of Reclassifications of Other Comprehensive Loss Components | The reclassifications of other comprehensive loss components out of accumulated other comprehensive loss for the years ended December 31, were as follows (in millions):
| | | | | | | | | | | | | Details about Other Comprehensive Income (Loss) Components | 2016 | | 2015 | | 2014 | Unrealized hedging gain (loss) | $ | 2.6 |
| | $ | — |
| | $ | — |
| Reclassification adjustment for interest expense included in net loss | 0.4 |
| | — |
| | — |
| Actuarial loss* | (4.6 | ) | | (7.1 | ) | | (26.7 | ) | Amortization of defined benefit pension items reclassified to net periodic pension cost: | | | | | | Prior service cost | — |
| | (0.4 | ) | | — |
| Net loss* | 7.5 |
| | 7.3 |
| | 4.5 |
| Prior service credit* | (0.9 | ) | | (1.3 | ) | | (1.3 | ) | Curtailment | (1.5 | ) | | — |
| | — |
| Total before income tax | 3.5 |
| | (1.5 | ) | | (23.5 | ) | Income taxes | (1.4 | ) | | 0.6 |
| | 9.2 |
| Other comprehensive income (loss) net of tax | $ | 2.1 |
| | $ | (0.9 | ) | | $ | (14.3 | ) |
| | * | These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 11 for additional details). |
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Schedule of New Accounting Pronouncements and Changes in Accounting Principles | The Company retrospectively applied ASU 2015-03 in accordance with the standard. The retrospective impact of adopting the above guidance as of December 31, 2015 was as follows: | | | | | | | | | | | | | | | | | | Other assets | | Total assets | | Long-term debt | | Total liabilities and equity | Previously reported | $ | 65.0 |
| | $ | 2,243.5 |
| | $ | 497.8 |
| | $ | 2,243.5 |
| Debt Issuance Costs | (1.2 | ) | | (1.2 | ) | | (1.2 | ) | | (1.2 | ) | Current presentation | $ | 63.8 |
| | $ | 2,242.3 |
| | $ | 496.6 |
| | $ | 2,242.3 |
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