Defined Benefit Plans Health Care Assumption Effect (Details) $ in Thousands |
12 Months Ended |
|---|---|
|
Dec. 31, 2015
USD ($)
| |
| Health Care Increase Decrease [Abstract] | |
| Effect on total service and interest cost components for 1% increase in health care costs | $ 118 |
| Effect on total service and interest cost components for 1% decrease in health care costs | (95) |
| Effect on post-retirement benefit obligation at December 31, 2015 for 1% increase in health care costs | 3,035 |
| Effect on post-retirement benefit obligation at December 31, 2015 for 1% decrease in health care costs | $ (2,471) |