1.0.0.3 false CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands false 1 $ false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDPerShare Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 false 2 $ false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDPerShare Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 false 3 $ false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDPerShare Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 false 4 $ false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDPerShare Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 3 OPERATING ACTIVITIES 1 us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false 4 false false 0 0 false false No definition available. false 4 Net income 2 us-gaap_NetIncomeLoss us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 true true 11071000 11071 false false 2 true true 50776000 50776 false false 3 true true 84174000 84174 false false 4 true true 51275000 51275 false false No definition available. No authoritative reference available. false 5 Income (loss) from discontinued operations 2 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 265000 265 false false 2 false true -5145000 -5145 false false 3 false true 12000 12 false false 4 false true 11636000 11636 false false No definition available. No authoritative reference available. false 6 Income from continuing operations 2 us-gaap_IncomeLossFromContinuingOperations us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 11336000 11336 false false 2 false true 45631000 45631 false false 3 false true 84186000 84186 false false 4 false true 62911000 62911 false false No definition available. No authoritative reference available. true 7 Adjustments to reconcile income from continuing operations to net cash provided by operating activities: 2 us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false 4 false false 0 0 false false No definition available. false 8 Depreciation 3 us-gaap_Depreciation us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 18268000 18268 false false 2 false true 12180000 12180 false false 3 false true 36002000 36002 false false 4 false true 24308000 24308 false false No definition available. No authoritative reference available. false 9 Other 3 us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesOther us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false true 20694000 20694 false false 4 false true 9556000 9556 false false No definition available. No authoritative reference available. false 10 Decrease (increase) in current assets: 2 us-gaap_IncreaseDecreaseInOperatingAssetsAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false 4 false false 0 0 false false No definition available. false 11 Receivables 3 us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false true 37960000 37960 false false 4 false true -49527000 -49527 false false No definition available. No authoritative reference available. false 12 Inventories 3 us-gaap_IncreaseDecreaseInInventories us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false true -61411000 -61411 false false 4 false true -16236000 -16236 false false No definition available. No authoritative reference available. false 13 Other current assets 3 us-gaap_IncreaseDecreaseInOtherOperatingAssets us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false true 6968000 6968 false false 4 false true 13976000 13976 false false No definition available. No authoritative reference available. false 14 Increase (decrease) in current liabilities: 2 us-gaap_IncreaseDecreaseInOperatingLiabilitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false 4 false false 0 0 false false No definition available. false 15 Accounts payable 3 us-gaap_IncreaseDecreaseInAccountsPayable us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false true -13639000 -13639 false false 4 false true 15938000 15938 false false No definition available. No authoritative reference available. false 16 Accrued expenses and other current liabilities 3 us-gaap_IncreaseDecreaseInAccruedLiabilities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false true -17601000 -17601 false false 4 false true -10051000 -10051 false false No definition available. No authoritative reference available. false 17 Cash flows provided by operating activities 2 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false true 93159000 93159 false false 4 false true 50875000 50875 false false No definition available. No authoritative reference available. true 18 INVESTING ACTIVITIES 1 us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false 4 false false 0 0 false false No definition available. false 19 Additions to property, plant and equipment 2 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false true -52363000 -52363 false false 4 false true -53999000 -53999 false false No definition available. No authoritative reference available. false 20 Other 2 us-gaap_PaymentsForProceedsFromOtherInvestingActivities us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false true 2278000 2278 false false 4 false true -1134000 -1134 false false No definition available. No authoritative reference available. false 21 Cash flows used in investing activities 2 us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false true -50085000 -50085 false false 4 false true -55133000 -55133 false false No definition available. No authoritative reference available. true 22 FINANCING ACTIVITIES 1 us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false 4 false false 0 0 false false No definition available. false 23 Proceeds from issuance of debt 2 us-gaap_ProceedsFromIssuanceOfLongTermDebt us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false 4 false true 280000000 280000 false false No definition available. No authoritative reference available. false 24 Retirements of debt 2 us-gaap_ProceedsFromRepaymentsOfDebt us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false true -48907000 -48907 false false 4 false true -315669000 -315669 false false No definition available. No authoritative reference available. false 25 Proceeds from stock offering 2 us-gaap_ProceedsFromIssuanceOfCommonStock us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false 4 false true 280432000 280432 false false No definition available. No authoritative reference available. false 26 Dividends paid 2 us-gaap_PaymentsOfDividends us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false true -10598000 -10598 false false 4 false true -5225000 -5225 false false No definition available. No authoritative reference available. false 27 Cash spun off to Financing 2 wlt_CashRelatedToSpinOffOfASubsidiary wlt false credit duration monetary Cash distributed with ownership spin-off. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false true -33821000 -33821 false false 4 false false 0 0 false false Cash distributed with ownership spin-off. No authoritative reference available. false 28 Purchases of stock under stock repurchase program 2 us-gaap_PaymentsForRepurchaseOfCommonStock us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false true -27963000 -27963 false false 4 false true -1765000 -1765 false false No definition available. No authoritative reference available. false 29 Other 2 us-gaap_ProceedsFromPaymentsForOtherFinancingActivities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false true 63000 63 false false 4 false true 6307000 6307 false false No definition available. No authoritative reference available. false 30 Cash flows provided by (used in) financing activities 2 us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false true -121226000 -121226 false false 4 false true 244080000 244080 false false No definition available. No authoritative reference available. true 31 Cash flows provided by (used in) continuing operations 1 wlt_NetCashProvidedByUsedInContinuingOperations wlt false debit duration monetary The net cash from (used in) the entity's operating activities,excluding those of discontinued operations, of the reporting... false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false true -78152000 -78152 false false 4 false true 239822000 239822 false false The net cash from (used in) the entity's operating activities,excluding those of discontinued operations, of the reporting entity. Operating activities generally involve producing and delivering goods and providing services. Operating activity cash flows include transactions, adjustments, and changes in value that are not defined as investing or financing activities. No authoritative reference available. true 32 CASH FLOWS FROM DISCONTINUED OPERATIONS 1 us-gaap_NetCashProvidedByUsedInDiscontinuedOperationsAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false 4 false false 0 0 false false No definition available. false 33 Cash flows provided by (used in) operating activities 2 us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false true 21981000 21981 false false 4 false true -6856000 -6856 false false No definition available. No authoritative reference available. false 34 Cash flows provided by investing activities 2 us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false true 23006000 23006 false false 4 false true 20521000 20521 false false No definition available. No authoritative reference available. false 35 Cash flows used in financing activities 2 us-gaap_CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false true -41385000 -41385 false false 4 false true -266448000 -266448 false false No definition available. No authoritative reference available. false 36 Cash flows provided by (used in) discontinued operations 2 us-gaap_NetCashProvidedByUsedInDiscontinuedOperations us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false true 3602000 3602 false false 4 false true -252783000 -252783 false false No definition available. No authoritative reference available. true 37 Net decrease in cash and cash equivalents 1 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false true -74550000 -74550 false false 4 false true -12961000 -12961 false false No definition available. No authoritative reference available. true 38 Cash and cash equivalents at beginning of period 1 us-gaap_CashAndCashEquivalentsAtCarryingValue us-gaap true debit instant monetary No definition available. false false false false false false true false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false true 116074000 116074 false false 4 false true 27459000 27459 false false No definition available. No authoritative reference available. false 39 Add: Cash and cash equivalents of discontinued operations at beginning of period 1 us-gaap_DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents us-gaap true debit instant monetary No definition available. false false false false false false true false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false true 1598000 1598 false false 4 false true 3155000 3155 false false No definition available. No authoritative reference available. false 40 Net decrease in cash and cash equivalents 1 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false true -74550000 -74550 false false 4 false true -12961000 -12961 false false No definition available. No authoritative reference available. false 41 Less: Cash and cash equivalents of discontinued operations at end of period 1 us-gaap_DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents us-gaap true debit instant monetary No definition available. false false false false false false false true false 1 false true 1092000 1092 false false 2 false true 2455000 2455 false false 3 false true 1092000 1092 false false 4 false true 2455000 2455 false false No definition available. No authoritative reference available. false 42 Cash and cash equivalents at end of period 1 us-gaap_CashAndCashEquivalentsAtCarryingValue us-gaap true debit instant monetary No definition available. false false false false false false false true false 1 false true 42030000 42030 false false 2 false true 15198000 15198 false false 3 false true 42030000 42030 false false 4 false true 15198000 15198 false false No definition available. No authoritative reference available. false 43 SUPPLEMENTAL DISCLOSURE 1 us-gaap_SupplementalCashFlowInformationAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false 4 false false 0 0 false false No definition available. false 44 Non-cash transaction: financing of one-year property insurance policy 2 wlt_PropertyInsurancePolicyFinancingAgreement wlt false na duration monetary The amount still owed associated with financing of property insurance policy for one year. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false true 12710000 12710 false false 4 false true 17355000 17355 false false The amount still owed associated with financing of property insurance policy for one year. No authoritative reference available. false 45 Non-cash transaction: dividend to spin off Financing 2 wlt_NonCashDividendRelatedToSpinOff wlt false na duration monetary Dividend (non-cash) distributed relating to the spin-off of Financing business. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 true true 437407000 437407 false false 4 false false 0 0 false false Dividend (non-cash) distributed relating to the spin-off of Financing business. No authoritative reference available. false false 4 43 false Thousands UnKnown UnKnown false true