Cover [Abstract] Document Type Amendment Flag Entity Registrant Name Entity Central Index Key Reported value of equity awards. Reported Value of Equity Awards [Member] Equity award adjustments. Equity Award Adjustments [Member] Year end fair value of equity awards. Year End Fair Value of Equity Awards [Member] Year over year change in fair value of outstanding and unvested equity awards. Year Over Year Change in Fair Value of Outstanding and Unvested Equity Awards [Member] Fair value as of vesting date of equity awards granted and vested in the year. Fair Value as of Vesting Date of Equity Awards Granted and Vested in the Year [Member] Year over year change in fair value of equity awards granted in prior years that vested in the year. Year Over Year Change in Fair Value of Equity Awards Granted in Prior Years that Vested in the Year [Member] Fair value at the end of the prior year of equity awards that failed to meet vesting conditions in the year. Fair Value at the End of the Prior Year of Equity Awards that Failed to Meet Vesting Conditions in the Year [Member] Value of dividends or other earnings paid on stock or option awards not otherwise reflected in fair value or total compensation. Value of Dividends or Other Earnings Paid on Stock or Option Awards not Otherwise Reflected in Fair Value or Total Compensation [Member]