2.2.0.25falsefalse06082 - Disclosure - Shareholders' Equity (Details 2)truefalsefalse1falsefalseUSDfalsefalse1/1/2010 - 12/31/2010 USD ($) USD ($) / shares $TwelveMonthsEnded_31Dec2010http://www.sec.gov/CIK0001458891duration2010-01-01T00:00:002010-12-31T00:00:00PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDEPSDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2falsefalseUSDfalsefalse1/1/2009 - 12/31/2009 USD ($) USD ($) / shares $TwelveMonthsEnded_31Dec2009http://www.sec.gov/CIK0001458891duration2009-01-01T00:00:002009-12-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDEPSDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$3falsefalseUSDfalsefalse1/1/2008 - 12/31/2008 USD ($) USD ($) / shares $TwelveMonthsEnded_31Dec2008http://www.sec.gov/CIK0001458891duration2008-01-01T00:00:002008-12-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDEPSDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$3true0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForwardus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringA roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.falsefalseSummary of stock options granted4false0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsetruefalsefalseperiodstartlabel1truefalsefalse31213173121317falsefalsefalsefalsefalse2truefalsefalse35539993553999falsefalsefalsefalsefalse3truefalsefalse43977734397773falsefalsefalsefalsefalseSharesxbrli:sharesItemTypesharesThe number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance-sheet date, including vested options.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(a) Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(b) falsefalseOutstanding at beginning of year, Number of Shares Underlying Options5false0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsetruefalsefalseperiodstartlabel1truefalsefalse24.3924.39falsetruefalsefalsefalse2truefalsefalse22.8422.84falsetruefalsefalsefalse3truefalsefalse21.2821.28falsetruefalsefalsefalseEPSus-types:perShareItemTypedecimalThe weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the stock option plan.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(a) falsetrueOutstanding at beginning of year, Weighted Average Exercise Price6false0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse212730212730falsefalsefalsefalsefalse2truefalsefalse302815302815falsefalsefalsefalsefalse3truefalsefalse168277168277falsefalsefalsefalsefalseSharesxbrli:sharesItemTypesharesThe quantity of shares issuable on stock options awarded under the plan during the reporting period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(d) falsefalseGranted, Number of Shares Underlying Options7false0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePriceus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse39.4639.46falsetruefalsefalsefalse2truefalsefalse24.6324.63falsetruefalsefalsefalse3truefalsefalse43.0143.01falsetruefalsefalsefalseEPSus-types:perShareItemTypedecimalThe weighted average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on stock options awarded under the plan during the reporting period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(d) falsetrueGranted, Weighted Average Exercise Price8false0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-549405-549405falsefalsefalsefalsefalse2truefalsefalse-718283-718283falsefalsefalsefalsefalse3truefalsefalse-1007750-1007750falsefalsefalsefalsefalseSharesxbrli:sharesItemTypesharesThe decrease in the number of reserved shares that could potentially be issued attributable to the exercise or conversion during the reporting period of previously issued stock options under the option plan.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(e) falsefalseExercised, Number of Shares Underlying Options9false0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePriceus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse21.1221.12falsetruefalsefalsefalse2truefalsefalse16.9416.94falsetruefalsefalsefalse3truefalsefalse19.2919.29falsetruefalsefalsefalseEPSus-types:perShareItemTypedecimalThe weighted average price at which option holders acquired shares when converting their stock options into shares under the plan during the reporting period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(e) falsetrueExercised, Weighted Average Exercise Price10false0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriodus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-17156-17156falsefalsefalsefalsefalse2truefalsefalse-17214-17214falsefalsefalsefalsefalse3truefalsefalse-4301-4301falsefalsefalsefalsefalseSharesxbrli:sharesItemTypesharesThe number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(f) falsefalseForfeited, Number of Shares Underlying Options11false0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePriceus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse20.7820.78falsetruefalsefalsefalse2truefalsefalse19.5219.52falsetruefalsefalsefalse3truefalsefalse24.0724.07falsetruefalsefalsefalseEPSus-types:perShareItemTypedecimalThe weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated during the reporting period due to noncompliance with plan terms during the reporting period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(f) falsetrueForfeited, Weighted Average Exercise Price12false0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumberus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsetruefalseperiodendlabel1truefalsefalse27674862767486falsefalsefalsefalsefalse2truefalsefalse31213173121317falsefalsefalsefalsefalse3truefalsefalse35539993553999falsefalsefalsefalsefalseSharesxbrli:sharesItemTypesharesThe number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance-sheet date, including vested options.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(a) Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(b) falsefalseOutstanding at end of year, Number of Shares Underlying Options13false0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsetruefalseperiodendlabel1truefalsefalse26.2226.22falsetruefalsefalsefalse2truefalsefalse24.3924.39falsetruefalsefalsefalse3truefalsefalse22.8422.84falsetruefalsefalsefalseEPSus-types:perShareItemTypedecimalThe weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the stock option plan.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(a) falsetrueOutstanding at end of year, Weighted Average Exercise Price14false0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumberus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse23106142310614falsefalsefalsefalsefalse2truefalsefalse26881792688179falsefalsefalsefalsefalse3truefalsefalse32322603232260falsefalsefalsefalsefalseSharesxbrli:sharesItemTypesharesThe number of shares into which fully or partially vested stock options outstanding as of the balance-sheet date can be currently converted under the option plan.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(c), d(2) falsefalseExercisable at end of year, Number of Shares Underlying Options15false0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePriceus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse24.7924.79falsetruefalsefalsefalse2truefalsefalse23.5223.52falsetruefalsefalsefalse3truefalsefalse21.2521.25falsetruefalsefalsefalseEPSus-types:perShareItemTypedecimalThe weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(c) falsetrueExercisable at end of year, Weighted Average Exercise Price313Shareholders' Equity (Details 2) (USD $)UnKnownNoRoundingNoRoundingUnKnownfalsetrue