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v2.4.1.9

Share Based Compensation - Share Based Compensation Expense (Income) Included in Operating Expense (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Share based and Long Term Incentive Compensation | $ 3,458 for_ShareBasedandLongTermIncentiveCompensation | $ 313 for_ShareBasedandLongTermIncentiveCompensation
General and administrative expense [Member] |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Share based and Long Term Incentive Compensation | 2,122 for_ShareBasedandLongTermIncentiveCompensation / us-gaap_IncomeStatementLocationAxis = us-gaap_GeneralAndAdministrativeExpenseMember | (23)for_ShareBasedandLongTermIncentiveCompensation / us-gaap_IncomeStatementLocationAxis = us-gaap_GeneralAndAdministrativeExpenseMember
Other Operating Expenses [Member] |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Share based and Long Term Incentive Compensation | $ 1,336 for_ShareBasedandLongTermIncentiveCompensation / us-gaap_IncomeStatementLocationAxis = for_OtherOperatingExpensesMember | $ 336 for_ShareBasedandLongTermIncentiveCompensation / us-gaap_IncomeStatementLocationAxis = for_OtherOperatingExpensesMember

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- Definition Share Based and Long Term Incentive Compensation + References No definition available. + Details
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Period Type: | duration

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Balance Type: |
Period Type: |

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- Details
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Balance Type: |
Period Type: |