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Segment Reporting - Reconciliation of Segment Information to Consolidated Financial Statements (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Operating income |  | $ 20,223 | $ 38,794 | $ 28,595 | $ 35,178 | $ 9,004 | $ 22,253 | $ 36,914 | $ 22,523 | $ 122,790 | $ 90,694 | $ 109,153
Business restructuring and asset impairments |  |  |  |  |  |  |  |  |  |  | (4,009) | (1,040)
Interest expense, net |  | (3,773) | (3,837) | (2,869) | (4,054) | (2,617) | (2,846) | (3,021) | (2,957) | (14,533) | (11,441) | (10,358)
Loss from equity in joint ventures |  |  |  |  |  |  |  |  |  | (6,985) | (5,008) | (5,336)
Other, net |  |  |  |  |  |  |  |  |  | 1,584 | 1,290 | 2,171
Consolidated income before income taxes |  | 15,061 | $ 33,113 | $ 24,146 | $ 30,536 | 6,012 | $ 18,228 | $ 33,206 | $ 18,089 | 102,856 | 75,535 | 95,630
Assets |  | 1,239,661 |  |  |  | 1,162,014 |  |  |  | 1,239,661 | 1,162,014 | 1,167,202
Capital expenditures |  |  |  |  |  |  |  |  |  | 119,349 | 101,819 | 92,865
Depreciation and amortization |  |  |  |  |  |  |  |  |  | 66,985 | 63,804 | 56,400
Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  |  | 189,419 | 131,955 | 165,639
Assets |  | 1,124,918 |  |  |  | 1,129,905 |  |  |  | 1,124,918 | 1,129,905 | 1,070,949
Capital expenditures |  |  |  |  |  |  |  |  |  | 116,867 | 98,823 | 91,440
Depreciation and amortization |  |  |  |  |  |  |  |  |  | 65,322 | 62,708 | 55,382
Segment Reconciling Items [Member] |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Business restructuring and asset impairments | [1] |  |  |  |  |  |  |  |  |  | (4,009) | (1,040)
Unallocated corporate expenses | [2] |  |  |  |  |  |  |  |  | (66,629) | (37,252) | (55,446)
Unallocated corporate assets | [3] | $ 114,743 |  |  |  | $ 32,109 |  |  |  | 114,743 | 32,109 | 96,253
Unallocated corporate expenditures |  |  |  |  |  |  |  |  |  | 2,482 | 2,996 | 1,425
Unallocated corporate depreciation expenses |  |  |  |  |  |  |  |  |  | $ 1,663 | $ 1,096 | $ 1,018
[1] | See Note 22 regarding business restructuring and asset impairment costs.
[2] | Unallocated corporate expenses primarily comprise corporate administrative expenses (e.g., corporate finance, legal, human resources, information systems, deferred compensation and environmental remediation) that are not included in segment operating income and not used to evaluate segment performance.
[3] | The changes in unallocated corporate assets between 2013 and 2015 were primarily attributable to changes in the balance of U.S. cash and cash equivalents, which are not allocated to segments.

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