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Condensed Consolidating Financial Statements - Condensed Consolidating Balance Sheet (Detail) - USD ($) $ in Thousands | Sep. 30, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Dec. 31, 2014
--- | --- | --- | --- | ---
Assets |  |  |  |
Cash and cash equivalents | $ 50,752 | $ 105,304 | $ 73,665 | $ 99,837
Other current assets | 478,816 | 447,063 |  |
Plant, equipment and timberlands, net | 771,453 | 698,864 |  |
Other assets | 253,218 | 249,185 |  |
Total assets | 1,554,239 | 1,500,416 |  |
Liabilities and Shareholders' Equity |  |  |  |
Current liabilities | 316,118 | 304,320 |  |
Long-term debt | 367,549 | 353,296 |  |
Deferred income taxes | 73,075 | 76,458 |  |
Other long-term liabilities | 105,808 | 103,095 |  |
Total liabilities | 862,550 | 837,169 |  |
Shareholders' equity | 691,689 | 663,247 |  |
Total liabilities and shareholders’ equity | 1,554,239 | 1,500,416 |  |
Adjustments/ Eliminations [Member] |  |  |  |
Assets |  |  |  |
Other current assets | (280,576) | (230,509) |  |
Investments in subsidiaries | (1,347,241) | (1,244,566) |  |
Total assets | (1,627,817) | (1,475,075) |  |
Liabilities and Shareholders' Equity |  |  |  |
Current liabilities | (280,576) | (230,523) |  |
Total liabilities | (280,576) | (230,523) |  |
Shareholders' equity | (1,347,241) | (1,244,552) |  |
Total liabilities and shareholders’ equity | (1,627,817) | (1,475,075) |  |
Parent Company [Member] |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 3,658 | 59,130 | 28,626 | 42,208
Other current assets | 222,853 | 199,690 |  |
Plant, equipment and timberlands, net | 351,301 | 286,334 |  |
Investments in subsidiaries | 798,376 | 737,450 |  |
Other assets | 115,900 | 106,586 |  |
Total assets | 1,492,088 | 1,389,190 |  |
Liabilities and Shareholders' Equity |  |  |  |
Current liabilities | 415,957 | 363,037 |  |
Long-term debt | 269,535 | 247,075 |  |
Deferred income taxes | 26,048 | 28,561 |  |
Other long-term liabilities | 88,859 | 87,270 |  |
Total liabilities | 800,399 | 725,943 |  |
Shareholders' equity | 691,689 | 663,247 |  |
Total liabilities and shareholders’ equity | 1,492,088 | 1,389,190 |  |
Guarantors [Member] |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 418 | 465 | 297 | 509
Other current assets | 265,889 | 238,515 |  |
Plant, equipment and timberlands, net | 20,918 | 1,114 |  |
Investments in subsidiaries | 548,865 | 507,116 |  |
Total assets | 836,090 | 747,210 |  |
Liabilities and Shareholders' Equity |  |  |  |
Current liabilities | 36,689 | 9,725 |  |
Long-term debt | 1,000 |  |  |
Deferred income taxes | (288) | (79) |  |
Other long-term liabilities | 313 |  |  |
Total liabilities | 37,714 | 9,646 |  |
Shareholders' equity | 798,376 | 737,564 |  |
Total liabilities and shareholders’ equity | 836,090 | 747,210 |  |
Non Guarantors [Member] |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 46,676 | 45,709 | $ 44,742 | $ 57,120
Other current assets | 270,650 | 239,367 |  |
Plant, equipment and timberlands, net | 399,234 | 411,416 |  |
Other assets | 137,318 | 142,599 |  |
Total assets | 853,878 | 839,091 |  |
Liabilities and Shareholders' Equity |  |  |  |
Current liabilities | 144,048 | 162,081 |  |
Long-term debt | 97,014 | 106,221 |  |
Deferred income taxes | 47,315 | 47,976 |  |
Other long-term liabilities | 16,636 | 15,825 |  |
Total liabilities | 305,013 | 332,103 |  |
Shareholders' equity | 548,865 | 506,988 |  |
Total liabilities and shareholders’ equity | $ 853,878 | $ 839,091 |  |

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