Pay vs Performance Disclosure [Line Items] Pay vs Performance Disclosure [Table] Pay vs Performance [Table Text Block] PEO Total Compensation Amount Non-PEO NEO Average Total Compensation Amount PEO Actually Paid Compensation Amount Non-PEO NEO Average Compensation Actually Paid Amount Total Shareholder Return Amount Peer Group Issuers, Footnote [Text Block] Peer Group Total Shareholder Return Amount Company Selected Measure Amount Company Selected Measure Name Non-GAAP Measure Description [Text Block] Measure [Axis] Measure Name Adjustment to Compensation [Axis] All Adjustments to Compensation [Member] Adjustment to Compensation Amount Named Executive Officers, Footnote [Text Block] PEO Name Adjustment To PEO Compensation, Footnote [Text Block] Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Compensation Actually Paid vs. Total Shareholder Return [Text Block] Compensation Actually Paid vs. Net Income [Text Block] Compensation Actually Paid vs. Company Selected Measure [Text Block] Total Shareholder Return Vs Peer Group [Text Block] Tabular List [Table Text Block] Executive Category [Axis] All Executive Categories [Member] PEO [Member] Non-PEO NEO [Member] Individual [Axis] All Individuals [Member] Net Income (Loss) Cover [Abstract] Document Type Amendment Flag Entity Registrant Name Entity Central Index Key Change in pension value during fiscal year. Change in Pension Value During Fiscal Year [Member] Pension service cost during fiscal year. Pension Service Cost During Fiscal Year [Member] Grant date fair value of awards granted in fiscal year. Grant Date Fair Value of Awards Granted in Fiscal Year [Member] Fair value of outstanding unvested awards granted in fiscal year at year-end. Fair Value of Outstanding Unvested Awards Granted in Fiscal Year at Year-End [Member] Fair value of awards granted in fiscal year that vested during fiscal year. Fair Value of Awards Granted in Fiscal Year that Vested During Fiscal Year [Member] Change in fair value of outstanding unvested awards granted in prior fiscal years. Change in Fair Value of Outstanding Unvested Awards Granted in Prior Fiscal Years [Member] Change in fair value of stock awards vested during the fiscal year. Change in Fair Value of Stock Awards Vested During the Fiscal Year [Member] Fair value as of prior fiscal year-end of unvested awards granted in prior fiscal years. Fair Value as of Prior Fiscal Year-End of Unvested Awards Granted in Prior Fiscal Years [Member]