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Condensed Consolidating Financial Statements - Condensed Consolidating Statement of Cash Flows (Detail) - USD ($) $ in Thousands | 9 Months Ended
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Sep. 30, 2016 | Sep. 30, 2015
Condensed Cash Flow Statements, Captions [Line Items] |  |
Net cash provided (used) by Operating activities | $ 59,437 | $ 70,523
Investing activities |  |
Expenditures for purchases of plant, equipment and timberlands | (116,948) | (74,280)
Proceeds from disposals of plant, equipment and timberlands, net | 55 | 3,181
Acquisition, net of cash acquired |  | (224)
Other | (400) | (1,600)
Net cash used by investing activities | (117,293) | (72,923)
Financing activities |  |
Net long-term borrowings | 14,983 | (3,387)
Payments of borrowing costs | (136) | (1,329)
Payment of dividends to shareholders | (16,134) | (15,215)
Proceeds from government grants | 5,251 |
Payments related to share-based compensation awards and other | (990) | (2,015)
Net cash provided (used) by financing activities | 2,974 | (21,946)
Effect of exchange rate on cash | 330 | (1,826)
Net decrease in cash and cash equivalents | (54,552) | (26,172)
Cash and cash equivalents at the beginning of period | 105,304 | 99,837
Cash and cash equivalents at the end of period | 50,752 | 73,665
Adjustments/ Eliminations [Member] |  |
Investing activities |  |
Repayments from intercompany loans | (11,101) | (55,320)
Advances of intercompany loans | 12,330 | 44,590
Intercompany capital (contributed) returned | 17,500 | (10,200)
Net cash used by investing activities | 18,729 | (20,930)
Financing activities |  |
Repayments of intercompany loans | 11,101 | 55,320
Borrowings of intercompany loans | (12,330) | (44,590)
Intercompany capital (returned) received | (17,500) | 10,200
Net cash provided (used) by financing activities | (18,729) | 20,930
Parent Company [Member] |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |
Net cash provided (used) by Operating activities | 41,753 | 9,927
Investing activities |  |
Expenditures for purchases of plant, equipment and timberlands | (78,187) | (52,331)
Proceeds from disposals of plant, equipment and timberlands, net | 41 | 1,584
Repayments from intercompany loans |  | 1,465
Intercompany capital (contributed) returned | (17,000) | 10,500
Other | (400) | (1,600)
Net cash used by investing activities | (95,546) | (40,382)
Financing activities |  |
Payments of borrowing costs | (136) | (1,329)
Payment of dividends to shareholders | (16,134) | (15,215)
Repayments of intercompany loans |  | (9,158)
Borrowings of intercompany loans | 12,330 | 44,590
Proceeds from government grants | 3,251 |
Payments related to share-based compensation awards and other | (990) | (2,015)
Net cash provided (used) by financing activities | (1,679) | 16,873
Net decrease in cash and cash equivalents | (55,472) | (13,582)
Cash and cash equivalents at the beginning of period | 59,130 | 42,208
Cash and cash equivalents at the end of period | 3,658 | 28,626
Guarantors [Member] |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |
Net cash provided (used) by Operating activities | 3,748 | 152
Investing activities |  |
Expenditures for purchases of plant, equipment and timberlands | (21,066) | (42)
Proceeds from disposals of plant, equipment and timberlands, net |  | 1,213
Repayments from intercompany loans | 11,101 | 53,855
Advances of intercompany loans | (12,330) | (44,590)
Intercompany capital (contributed) returned | (500) | (300)
Net cash used by investing activities | (22,795) | 10,136
Financing activities |  |
Intercompany capital (returned) received | 17,000 | (10,500)
Proceeds from government grants | 2,000 |
Net cash provided (used) by financing activities | 19,000 | (10,500)
Net decrease in cash and cash equivalents | (47) | (212)
Cash and cash equivalents at the beginning of period | 465 | 509
Cash and cash equivalents at the end of period | 418 | 297
Non Guarantors [Member] |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |
Net cash provided (used) by Operating activities | 13,936 | 60,444
Investing activities |  |
Expenditures for purchases of plant, equipment and timberlands | (17,695) | (21,907)
Proceeds from disposals of plant, equipment and timberlands, net | 14 | 384
Acquisition, net of cash acquired |  | (224)
Net cash used by investing activities | (17,681) | (21,747)
Financing activities |  |
Net long-term borrowings | 14,983 | (3,387)
Repayments of intercompany loans | (11,101) | (46,162)
Intercompany capital (returned) received | 500 | 300
Net cash provided (used) by financing activities | 4,382 | (49,249)
Effect of exchange rate on cash | 330 | (1,826)
Net decrease in cash and cash equivalents | 967 | (12,378)
Cash and cash equivalents at the beginning of period | 45,709 | 57,120
Cash and cash equivalents at the end of period | $ 46,676 | $ 44,742

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