1.0.0.3 true Consolidated Statements of Stockholders' Equity and Comprehensive Income (USD $) In Thousands false 1 $ true false false false Additional Paid-in Capital [Member] us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_AdditionalPaidInCapitalMember us-gaap_StatementEquityComponentsAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 false 2 $ true false false false Accumulated Other Comprehensive Income (Loss) [Member] us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_AccumulatedOtherComprehensiveIncomeMember us-gaap_StatementEquityComponentsAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 false 3 $ true false false false Common Stock [Member] us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_CommonStockMember us-gaap_StatementEquityComponentsAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 false 4 $ true false false false Treasury Stock [Member] us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_TreasuryStockMember us-gaap_StatementEquityComponentsAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 false 5 $ true false false false Retained Earnings [Member] us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_RetainedEarningsMember us-gaap_StatementEquityComponentsAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 false 6 $ false false Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 6 Shares, Issued, Beginning Balance at Dec. 31, 2006 3 us-gaap_SharesIssued us-gaap true na instant shares No definition available. false false false true false false true false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true 144092000 144092 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 false false No definition available. No authoritative reference available. false 5 Stockholders' equity, beginning balance at Dec. 31, 2006 3 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false true false false true false false 1 true true 554169000 554169 true false 2 true true 43665000 43665 true false 3 true true 1441000 1441 true false 4 true true -1563649000 -1563649 true false 5 true true 1326757000 1326757 true false 6 true true 362383000 362383 false false No definition available. No authoritative reference available. false 7 Net income 3 us-gaap_ProfitLoss us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false true 268072000 268072 true false 6 false true 268072000 268072 false false No definition available. No authoritative reference available. false 8 Other comprehensive income (loss), foreign currency translation 3 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false true 26276000 26276 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true 26276000 26276 false false No definition available. No authoritative reference available. false 9 Other comprehensive income (loss), net appreciation (depreciation) and realized gains (losses) on derivative instruments, net of tax 3 us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false true -11720000 -11720 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true -11720000 -11720 false false No definition available. No authoritative reference available. false 10 Other comprehensive income (loss), changes in pension and postretirement benefits, net of tax 3 us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false true 8852000 8852 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true 8852000 8852 false false No definition available. No authoritative reference available. false 11 Other comprehensive income (loss), unrealized losses on investments, net 3 us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false true -841000 -841 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true -841000 -841 false false No definition available. No authoritative reference available. true 12 Other comprehensive income (loss) 3 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false true 22567000 22567 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true 22567000 22567 false false No definition available. No authoritative reference available. true 14 Issuance of common stock for employees, stock purchase plan 3 us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 2883000 2883 true false 2 false false 0 0 true false 3 false true 1000 1 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true 2884000 2884 false false No definition available. No authoritative reference available. false 15 Issuance of common stock for employees, stock purchase plan, shares 4 us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans us-gaap true na duration shares No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true 61000 61 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 false false No definition available. No authoritative reference available. false 16 Issuance of common stock for employees, stock options exercised 3 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 88515000 88515 true false 2 false false 0 0 true false 3 false true 28000 28 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true 88543000 88543 false false No definition available. No authoritative reference available. false 17 Issuance of common stock for employees, stock options exercised, shares 4 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised us-gaap true na duration shares No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true 2844000 2844 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 false false No definition available. No authoritative reference available. false 18 Tax benefit related to stock option plans 3 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 16999000 16999 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true 16999000 16999 false false No definition available. No authoritative reference available. false 20 Adoption of FIN 48 3 us-gaap_CumulativeEffectOfInitialAdoptionOfFIN48 us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false true -3905000 -3905 true false 6 false true -3905000 -3905 false false No definition available. No authoritative reference available. false 21 Treasury stock 3 us-gaap_TreasuryStockValueAcquiredCostMethod us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false true -200648000 -200648 true false 5 false false 0 0 true false 6 false true -200648000 -200648 false false No definition available. No authoritative reference available. false 22 Stock-based compensation 3 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 29180000 29180 true false 2 false true 0 0 true false 3 false true 1000 1 true false 4 false true 0 0 true false 5 false true 0 0 true false 6 false true 29181000 29181 false false No definition available. No authoritative reference available. true 23 Stock-based compensation, shares 4 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation us-gaap true na duration shares No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true 64000 64 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 false false No definition available. No authoritative reference available. false 26 Increase (Decrease) in Stockholders' Equity [Roll Forward] 3 us-gaap_IncreaseDecreaseInStockholdersEquityRollForward us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 false false No definition available. false 24 Stockholders' equity, ending balance at Dec. 31, 2007 3 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false true false false false true false 1 false true 691746000 691746 true false 2 false true 66232000 66232 true false 3 false true 1471000 1471 true false 4 false true -1764297000 -1764297 true false 5 false true 1590924000 1590924 true false 6 false true 586076000 586076 false false No definition available. No authoritative reference available. false 25 Shares, Issued, Ending Balance at Dec. 31, 2007 3 us-gaap_SharesIssued us-gaap true na instant shares No definition available. false false false true false false false true false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true 147061000 147061 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 false false No definition available. No authoritative reference available. false 7 Net income 3 us-gaap_ProfitLoss us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false true 322479000 322479 true false 6 false true 322479000 322479 false false No definition available. No authoritative reference available. false 8 Other comprehensive income (loss), foreign currency translation 3 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false true -53704000 -53704 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true -53704000 -53704 false false No definition available. No authoritative reference available. false 9 Other comprehensive income (loss), net appreciation (depreciation) and realized gains (losses) on derivative instruments, net of tax 3 us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false true -519000 -519 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true -519000 -519 false false No definition available. No authoritative reference available. false 10 Other comprehensive income (loss), changes in pension and postretirement benefits, net of tax 3 us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false true -20466000 -20466 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true -20466000 -20466 false false No definition available. No authoritative reference available. false 11 Other comprehensive income (loss), unrealized losses on investments, net 3 us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false true -124000 -124 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true -124000 -124 false false No definition available. No authoritative reference available. true 12 Other comprehensive income (loss) 3 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false true -74813000 -74813 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true -74813000 -74813 false false No definition available. No authoritative reference available. true 14 Issuance of common stock for employees, stock purchase plan 3 us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 3409000 3409 true false 2 false false 0 0 true false 3 false true 1000 1 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true 3410000 3410 false false No definition available. No authoritative reference available. false 15 Issuance of common stock for employees, stock purchase plan, shares 4 us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans us-gaap true na duration shares No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true 61000 61 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 false false No definition available. No authoritative reference available. false 16 Issuance of common stock for employees, stock options exercised 3 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 25228000 25228 true false 2 false false 0 0 true false 3 false true 8000 8 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true 25236000 25236 false false No definition available. No authoritative reference available. false 17 Issuance of common stock for employees, stock options exercised, shares 4 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised us-gaap true na duration shares No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true 825000 825 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 false false No definition available. No authoritative reference available. false 18 Tax benefit related to stock option plans 3 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 6669000 6669 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true 6669000 6669 false false No definition available. No authoritative reference available. false 19 Increase in valuation allowance 3 wat_IncreaseInValuationAllowance wat false debit duration monetary Increase in valuation allowance false false false false false false false false false 1 false true -1732000 -1732 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true -1732000 -1732 false false Increase in valuation allowance No authoritative reference available. false 21 Treasury stock 3 us-gaap_TreasuryStockValueAcquiredCostMethod us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false true -237500000 -237500 true false 5 false false 0 0 true false 6 false true -237500000 -237500 false false No definition available. No authoritative reference available. false 22 Stock-based compensation 3 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 31179000 31179 true false 2 false true 0 0 true false 3 false true 1000 1 true false 4 false true 0 0 true false 5 false true 0 0 true false 6 false true 31180000 31180 false false No definition available. No authoritative reference available. true 23 Stock-based compensation, shares 4 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation us-gaap true na duration shares No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true 122000 122 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 false false No definition available. No authoritative reference available. false 26 Increase (Decrease) in Stockholders' Equity [Roll Forward] 3 us-gaap_IncreaseDecreaseInStockholdersEquityRollForward us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 false false No definition available. false 24 Stockholders' equity, ending balance at Dec. 31, 2008 3 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false true false false false true false 1 false true 756499000 756499 true false 2 false true -8581000 -8581 true false 3 false true 1481000 1481 true false 4 false true -2001797000 -2001797 true false 5 false true 1913403000 1913403 true false 6 false true 661005000 661005 false false No definition available. No authoritative reference available. false 25 Shares, Issued, Ending Balance at Dec. 31, 2008 3 us-gaap_SharesIssued us-gaap true na instant shares No definition available. false false false true false false false true false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true 148069000 148069 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 false false No definition available. No authoritative reference available. false 7 Net income 3 us-gaap_ProfitLoss us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false true 323313000 323313 true false 6 false true 323313000 323313 false false No definition available. No authoritative reference available. false 8 Other comprehensive income (loss), foreign currency translation 3 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false true 19405000 19405 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true 19405000 19405 false false No definition available. No authoritative reference available. false 9 Other comprehensive income (loss), net appreciation (depreciation) and realized gains (losses) on derivative instruments, net of tax 3 us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false true 1798000 1798 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true 1798000 1798 false false No definition available. No authoritative reference available. false 10 Other comprehensive income (loss), changes in pension and postretirement benefits, net of tax 3 us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false true 2977000 2977 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true 2977000 2977 false false No definition available. No authoritative reference available. false 11 Other comprehensive income (loss), unrealized losses on investments, net 3 us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false true -25000 -25 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true -25000 -25 false false No definition available. No authoritative reference available. true 12 Other comprehensive income (loss) 3 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false true 24155000 24155 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true 24155000 24155 false false No definition available. No authoritative reference available. true 14 Issuance of common stock for employees, stock purchase plan 3 us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 3243000 3243 true false 2 false false 0 0 true false 3 false true 1000 1 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true 3244000 3244 false false No definition available. No authoritative reference available. false 15 Issuance of common stock for employees, stock purchase plan, shares 4 us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans us-gaap true na duration shares No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true 88 88 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 false false No definition available. No authoritative reference available. false 16 Issuance of common stock for employees, stock options exercised 3 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 15850000 15850 true false 2 false false 0 0 true false 3 false true 5000 5 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true 15855000 15855 false false No definition available. No authoritative reference available. false 17 Issuance of common stock for employees, stock options exercised, shares 4 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised us-gaap true na duration shares No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true 514000 514 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 false false No definition available. No authoritative reference available. false 18 Tax benefit related to stock option plans 3 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 5083000 5083 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true 5083000 5083 false false No definition available. No authoritative reference available. false 19 Increase in valuation allowance 3 wat_IncreaseInValuationAllowance wat false debit duration monetary Increase in valuation allowance false false false false false false false false false 1 false true -705000 -705 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true -705000 -705 false false Increase in valuation allowance No authoritative reference available. false 21 Treasury stock 3 us-gaap_TreasuryStockValueAcquiredCostMethod us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false true -211377000 -211377 true false 5 false false 0 0 true false 6 false true -211377000 -211377 false false No definition available. No authoritative reference available. false 22 Stock-based compensation 3 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 28375000 28375 true false 2 false true 0 0 true false 3 false true 1000 1 true false 4 false true 0 0 true false 5 false true 0 0 true false 6 false true 28376000 28376 false false No definition available. No authoritative reference available. true 23 Stock-based compensation, shares 4 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation us-gaap true na duration shares No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true 160000 160 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 false false No definition available. No authoritative reference available. false 26 Increase (Decrease) in Stockholders' Equity [Roll Forward] 3 us-gaap_IncreaseDecreaseInStockholdersEquityRollForward us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 false false No definition available. false 24 Stockholders' equity, ending balance at Dec. 31, 2009 3 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false true false false false true false 1 true true 808345000 808345 true false 2 true true 15574000 15574 true false 3 true true 1488000 1488 true false 4 true true -2213174000 -2213174 true false 5 true true 2236716000 2236716 true false 6 true true 848949000 848949 false false No definition available. No authoritative reference available. false 25 Shares, Issued, Ending Balance at Dec. 31, 2009 3 us-gaap_SharesIssued us-gaap true na instant shares No definition available. false false false true false false false true false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true 148831000 148831 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 false false No definition available. No authoritative reference available. false false 6 56 false Thousands Thousands UnKnown false true