Cover [Abstract] Document Type Amendment Flag Entity Registrant Name Entity Central Index Key SCT "stock awards" column value. SCT "Stock Awards" [Member] SCT "option awards" column value. SCT "Option Awards" [Member] Difference between the fair value of awards from the end of the prior fiscal year to the end of the covered fiscal year for awards granted in any prior fiscal year that are outstanding and unvested at the end of the covered year. Difference Between the Fair Value of Awards from the End of the Prior Fiscal Year to the End of the Covered Fiscal Year for Awards Granted in Any Prior Fiscal Year that are Outstanding and Unvested at the End of the Covered Year [Member] Year-end fair value of outstanding equity awards granted in covered year. Year-End Fair Value of Outstanding Equity Awards Granted in Covered Year [Member] Change in fair value from the end of the prior fiscal year to the vesting date for awards granted in any prior fiscal year which vested during the covered fiscal year. Change in Fair Value from the End of the Prior Fiscal Year to the Vesting Date for Awards Granted in Any Prior Fiscal Year which Vested During the Covered Fiscal Year [Member]