Supplementary Data on Cash Flows (Details 2) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended |
---|---|---|
Dec. 31, 2017 |
Dec. 31, 2017 |
|
Effect of Tax Cuts and Jobs Act of 2017 | ||
Increase in income tax expense | $ 10,095 | |
Tax Cuts and Jobs Act of 2017 | ||
Effect of Tax Cuts and Jobs Act of 2017 | ||
Increase in income tax expense | $ 10,100 | 10,100 |
Increase in income tax expense due to re-measurement of net deferred tax assets | 19,900 | |
Deferred tax benefit related to acceleration of pension contributions | $ (9,800) |