Share Price Cover [Abstract] Document Type Amendment Flag Entity Registrant Name Entity Central Index Key Stock awards and option awards reported in summary compensation table. Stock Awards and Option Awards Reported in Summary Compensation Table [Member] Year-end fair value of outstanding and unvested equity awards granted in the year. Year-End Fair Value of Outstanding and Unvested Equity Awards Granted in the Year [Member] Year-over-year change in fair value of outstanding and unvested equity awards granted in prior years. Year-Over-Year Change in Fair Value of Outstanding and Unvested Equity Awards Granted in Prior Years [Member] Year-over-year change in fair value (from the end of the prior year through the vesting date) of equity awards granted in prior years that vested in the year. Year-Over-Year Change in Fair Value (from the End of the Prior Year Through the Vesting Date) Of Equity Awards Granted in Prior Years That Vested in the Year [Member] Prior year-end fair value for any equity awards forfeited in the year. Prior Year-End Fair Value for Any Equity Awards Forfeited in the Year [Member]