Cover [Abstract] Document Type Amendment Flag Entity Registrant Name Entity Central Index Key Adjustment for stock compensation per Summary Compensation Table. Stock Compensation Per Summary Compensation Table [Member] Adjustment for change in value of prior period stock compensation. Change in Value of Prior Period Stock Compensation [Member] Adjustment for change in pension value per Summary Compensation Table. Change in Pension Value Per Summary Compensation Table [Member] Adjustment for pension service costs. Pension Service Costs [Member]