Cover [Abstract] Document Type Amendment Flag Entity Registrant Name Entity Central Index Key Thomas L. Deitrich [Member] Dividends or dividend equivalents not otherwise included in total compensation. Dividends or Dividend Equivalents Not Otherwise Included in Total Compensation [Member] Forfeitures during current year equal to prior year-end fair value. Forfeitures during Current Year Equal to Prior Year-End Fair Value [Member] Difference in fair values between prior year-end fair values and vest date fair values for awards granted in prior years. Difference in Fair Values between Prior Year-End Fair Values and Vest Date Fair Values for Awards Granted in Prior Years [Member] Fair values at vest date for awards granted and vested in current year. Fair Values at Vest Date for Awards Granted and Vested in Current Year [Member] Year-over-year difference of year-end fair values for unvested awards granted in prior years. Year-Over-Year Difference of Year-End Fair Values for Unvested Awards Granted in Prior Years [Member] Total adjustments for pension. Total Adjustments for Pension [Member] Adjustment for summary compensation table pension. Adjustment for Summary Compensation Table Pension [Member] Amount added for current year service cost. Amount Added for Current Year Service Cost [Member] Amount added for prior service cost impacting current year. Amount Added for Prior Service Cost Impacting Current Year [Member] Total adjustments for equity awards. Total Adjustments for Equity Awards [Member] Adjustment for grant date values in the summary compensation Table. Adjustment for Grant Date Values in the Summary Compensation Table [Member] Year-end fair value of unvested awards granted in the current year. Year-End Fair Value of Unvested Awards Granted in the Current Year [Member] Peer group cumulative total shareholder return (TSR) if the Company continued to use the same peer group as it did in previous years. Peer Group Total Shareholder Return Amount if Company Continued to Use Same Peer Group As Previous Years Peer group's cumulative TSR if Company continued to use the same peer group as it did in previous years