XML 89 R138.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Condensed Consolidating Financial Statements - Condensed Consolidating Statement of Cash Flows (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Condensed Cash Flow Statements, Captions [Line Items] |  |  |
Net cash provided (used) by Operating activities | $ 99,577 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations | $ 173,635 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations | $ 112,846 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
Investing activities |  |  |
Expenditures for purchases of plant, equipment and timberlands | (66,046)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | (103,047)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | (58,752)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Proceeds from disposals of plant, equipment and timberlands, net | 5,072 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment | 1,947 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment | 10,272 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Acquisitions, net of cash acquired | (8,015)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired | (210,911)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired |
Other | (600)us-gaap_PaymentsForProceedsFromOtherInvestingActivities | (425)us-gaap_PaymentsForProceedsFromOtherInvestingActivities | (225)us-gaap_PaymentsForProceedsFromOtherInvestingActivities
Net cash used by investing activities | (69,589)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations | (312,436)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations | (48,705)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
Financing activities |  |  |
Net (repayments of) proceeds from indebtedness | (18,128)us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt | 182,230 us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt | 17,869 us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt
Payments of note offering costs |  | (419)us-gaap_PaymentsOfDebtIssuanceCosts | (4,748)us-gaap_PaymentsOfDebtIssuanceCosts
Payment of dividends to shareholders | (18,696)us-gaap_PaymentsOfDividendsCommonStock | (16,965)us-gaap_PaymentsOfDividendsCommonStock | (15,608)us-gaap_PaymentsOfDividendsCommonStock
Repurchases of common stock | (12,180)us-gaap_PaymentsForRepurchaseOfCommonStock |  | (5,675)us-gaap_PaymentsForRepurchaseOfCommonStock
Payments related to share-based compensation awards and other | (1,877)us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions | (1,671)us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions | 2,673 us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions
Net cash (used) provided by financing activities | (50,881)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations | 163,175 us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations | (5,489)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Effect of exchange rate on cash | (2,152)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents | 829 us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents | 750 us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
Net (decrease) increase in cash and cash equivalents | (23,045)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | 25,203 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | 59,402 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents at the beginning of period | 122,882 us-gaap_CashAndCashEquivalentsAtCarryingValue | 97,679 us-gaap_CashAndCashEquivalentsAtCarryingValue | 38,277 us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents at the end of period | 99,837 us-gaap_CashAndCashEquivalentsAtCarryingValue | 122,882 us-gaap_CashAndCashEquivalentsAtCarryingValue | 97,679 us-gaap_CashAndCashEquivalentsAtCarryingValue
Net (decrease) increase in cash and cash equivalents | (23,045)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | 25,203 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | 59,402 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Adjustments/ Eliminations [Member] |  |  |
Investing activities |  |  |
Repayments from intercompany loans | (20,840)us-gaap_PaymentsToFundLongtermLoansToRelatedParties / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | (18,223)us-gaap_PaymentsToFundLongtermLoansToRelatedParties / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | (35,431)us-gaap_PaymentsToFundLongtermLoansToRelatedParties / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Advances of intercompany loans | 39,011 us-gaap_ProceedsFromCollectionOfLongtermLoansToRelatedParties / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 27,216 us-gaap_ProceedsFromCollectionOfLongtermLoansToRelatedParties / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 34,980 us-gaap_ProceedsFromCollectionOfLongtermLoansToRelatedParties / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Intercompany capital contributed |  | 91 glt_PaymentsForIntercompanyCapitalContributed / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |
Net cash used by investing activities | 18,171 us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 9,084 us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | (451)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Financing activities |  |  |
Repayments of intercompany loans | 20,840 us-gaap_RepaymentsOfRelatedPartyDebt / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 18,223 us-gaap_RepaymentsOfRelatedPartyDebt / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 35,431 us-gaap_RepaymentsOfRelatedPartyDebt / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Borrowings of intercompany loans | (39,011)us-gaap_ProceedsFromRelatedPartyDebt / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | (27,216)us-gaap_ProceedsFromRelatedPartyDebt / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | (34,980)us-gaap_ProceedsFromRelatedPartyDebt / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Intercompany capital received |  | (91)glt_ProceedsFromIntercompanyCapitalContributed / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |
Net cash (used) provided by financing activities | (18,171)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | (9,084)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | 451 us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember
Parent Company [Member] |  |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |  |
Net cash provided (used) by Operating activities | 36,240 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 55,507 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 25,787 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Investing activities |  |  |
Expenditures for purchases of plant, equipment and timberlands | (34,518)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (39,496)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (23,463)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Proceeds from disposals of plant, equipment and timberlands, net | 3,707 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 1,435 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 10,236 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Repayments from intercompany loans |  |  | 6,088 us-gaap_PaymentsToFundLongtermLoansToRelatedParties / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Advances of intercompany loans | (12,671)us-gaap_ProceedsFromCollectionOfLongtermLoansToRelatedParties / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | (91)us-gaap_ProceedsFromCollectionOfLongtermLoansToRelatedParties / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Other | (600)us-gaap_PaymentsForProceedsFromOtherInvestingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (425)us-gaap_PaymentsForProceedsFromOtherInvestingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (225)us-gaap_PaymentsForProceedsFromOtherInvestingActivities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net cash used by investing activities | (44,082)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (38,486)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (7,455)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Financing activities |  |  |
Net (repayments of) proceeds from indebtedness |  |  | 17,869 us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Payments of note offering costs |  | (160)us-gaap_PaymentsOfDebtIssuanceCosts / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (4,748)us-gaap_PaymentsOfDebtIssuanceCosts / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Payment of dividends to shareholders | (18,696)us-gaap_PaymentsOfDividendsCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (16,965)us-gaap_PaymentsOfDividendsCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (15,608)us-gaap_PaymentsOfDividendsCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Repurchases of common stock | (12,180)us-gaap_PaymentsForRepurchaseOfCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | (5,675)us-gaap_PaymentsForRepurchaseOfCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Repayments of intercompany loans |  | (1,100)us-gaap_RepaymentsOfRelatedPartyDebt / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Borrowings of intercompany loans | 26,340 us-gaap_ProceedsFromRelatedPartyDebt / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 15,310 us-gaap_ProceedsFromRelatedPartyDebt / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 27,875 us-gaap_ProceedsFromRelatedPartyDebt / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Payments related to share-based compensation awards and other | (1,630)us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (1,671)us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 2,673 us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net cash (used) provided by financing activities | (6,166)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (4,586)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 22,386 us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net (decrease) increase in cash and cash equivalents |  |  | 40,718 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Cash and cash equivalents at the beginning of period | 56,216 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 43,781 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 3,063 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Cash and cash equivalents at the end of period | 42,208 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 56,216 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 43,781 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net (decrease) increase in cash and cash equivalents |  |  | 40,718 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Guarantors [Member] |  |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |  |
Net cash provided (used) by Operating activities | 4,158 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 4,974 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 5,958 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Investing activities |  |  |
Proceeds from disposals of plant, equipment and timberlands, net | 1,355 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 333 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |
Repayments from intercompany loans | 20,840 us-gaap_PaymentsToFundLongtermLoansToRelatedParties / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 18,223 us-gaap_PaymentsToFundLongtermLoansToRelatedParties / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 29,343 us-gaap_PaymentsToFundLongtermLoansToRelatedParties / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Advances of intercompany loans | (26,340)us-gaap_ProceedsFromCollectionOfLongtermLoansToRelatedParties / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (27,216)us-gaap_ProceedsFromCollectionOfLongtermLoansToRelatedParties / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (34,375)us-gaap_ProceedsFromCollectionOfLongtermLoansToRelatedParties / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Intercompany capital contributed |  | (91)glt_PaymentsForIntercompanyCapitalContributed / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |
Net cash used by investing activities | (4,145)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (8,751)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (5,032)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Financing activities |  |  |
Borrowings of intercompany loans |  |  | 514 us-gaap_ProceedsFromRelatedPartyDebt / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Net cash (used) provided by financing activities |  |  | 514 us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Net (decrease) increase in cash and cash equivalents |  |  | 1,440 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Cash and cash equivalents at the beginning of period | 501 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 4,278 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 2,838 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Cash and cash equivalents at the end of period | 514 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 501 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 4,278 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Net (decrease) increase in cash and cash equivalents |  |  | 1,440 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Non Guarantors [Member] |  |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |  |
Net cash provided (used) by Operating activities | 59,179 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 113,154 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 81,101 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Investing activities |  |  |
Expenditures for purchases of plant, equipment and timberlands | (31,528)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (63,551)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (35,289)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Proceeds from disposals of plant, equipment and timberlands, net | 10 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 179 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 36 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Advances of intercompany loans |  |  | (514)us-gaap_ProceedsFromCollectionOfLongtermLoansToRelatedParties / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Acquisitions, net of cash acquired | (8,015)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (210,911)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |
Net cash used by investing activities | (39,533)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (274,283)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (35,767)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Financing activities |  |  |
Net (repayments of) proceeds from indebtedness | (18,128)us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 182,230 us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |
Payments of note offering costs |  | (259)us-gaap_PaymentsOfDebtIssuanceCosts / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |
Repayments of intercompany loans | (20,840)us-gaap_RepaymentsOfRelatedPartyDebt / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (17,123)us-gaap_RepaymentsOfRelatedPartyDebt / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (35,431)us-gaap_RepaymentsOfRelatedPartyDebt / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Borrowings of intercompany loans | 12,671 us-gaap_ProceedsFromRelatedPartyDebt / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 11,906 us-gaap_ProceedsFromRelatedPartyDebt / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 6,591 us-gaap_ProceedsFromRelatedPartyDebt / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Intercompany capital received |  | 91 glt_ProceedsFromIntercompanyCapitalContributed / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |
Payments related to share-based compensation awards and other | (247)us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |
Net cash (used) provided by financing activities | (26,544)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 176,845 us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (28,840)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Effect of exchange rate on cash | (2,152)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 829 us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 750 us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Net (decrease) increase in cash and cash equivalents |  |  | 17,244 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Cash and cash equivalents at the beginning of period | 66,165 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 49,620 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 32,376 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Cash and cash equivalents at the end of period | 57,115 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 66,165 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 49,620 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Net (decrease) increase in cash and cash equivalents |  |  | $ 17,244 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember

X
- Definition Payments for intercompany capital contributed. + References No definition available. + Details
Name: | glt_PaymentsForIntercompanyCapitalContributed
Namespace Prefix: | glt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Proceeds from intercompany capital contributed. + References No definition available. + Details
Name: | glt_ProceedsFromIntercompanyCapitalContributed
Namespace Prefix: | glt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3044-108585 + Details
Name: | us-gaap_CashAndCashEquivalentsAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 230 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450594&loc=d3e33268-110906 + Details
Name: | us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_CondensedCashFlowStatementsCaptionsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase (decrease) from the effect of exchange rate changes on cash and cash equivalent balances held in foreign currencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 230 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450594&loc=d3e33268-110906 + Details
Name: | us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of cash inflow (outflow) of financing activities, excluding discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3574-108585 + Details
Name: | us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of cash inflow (outflow) of investing activities, excluding discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3574-108585 + Details
Name: | us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of cash inflow (outflow) from operating activities, excluding discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
Name: | us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition The net cash outflow or inflow from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3095-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585 + Details
Name: | us-gaap_PaymentsForProceedsFromOtherInvestingActivities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentsForRepurchaseOfCommonStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentsOfDebtIssuanceCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentsOfDividendsCommonStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow associated with extending a long-term loan to a related party. Alternate caption: Payments for Advances to Affiliates. + References No definition available. + Details
Name: | us-gaap_PaymentsToFundLongtermLoansToRelatedParties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash inflow associated with collection, whether partial or full, of long-term loans to a related party. Alternate caption: Proceeds from Advances to Affiliates. + References No definition available. + Details
Name: | us-gaap_ProceedsFromCollectionOfLongtermLoansToRelatedParties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The total cash inflow associated with the amount received from holders to acquire the entity's shares under incentive and share awards, including stock option exercises. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow from a long-term borrowing made from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Proceeds from Advances from Affiliates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromRelatedPartyDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of cash inflow (outflow) from long-term debt by a related party. Related parties, include, but are not limited to, affiliates, owners or officers and their immediate families, and pension trusts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
Name: | us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash outflow for the payment of a long-term borrowing made from a related party where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Payments for Advances from Affiliates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
Name: | us-gaap_RepaymentsOfRelatedPartyDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=us-gaap_GuarantorSubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=us-gaap_NonGuarantorSubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=us-gaap_ParentCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidationItemsAxis=us-gaap_ConsolidationEliminationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |