Income Taxes (Deferred Tax Liabilities and Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred tax liabilities:
Depreciation	$ (93,475)	$ (69,622)
Deferred profit (for tax purposes) on sale to finance subsidiary	(98,247)	(108,061)
Lease revenue and related depreciation	(137,665)	(188,231)
Intangible assets	(113,128)	(119,453)
Other	(27,340)	(41,149)
Gross deferred tax liabilities	(469,855)	(526,516)
Deferred tax assets:
Nonpension postretirement benefits	71,101	79,861
Pension	105,564	104,166
Inventory and equipment capitalization	13,318	14,934
Restructuring charges	6,980	14,238
Long-term incentives	17,923	22,111
Net operating loss	97,194	111,351
Tax credit carry forwards	53,181	54,183
Tax uncertainties gross-up	18,273	21,191
Other	79,799	96,412
Gross deferred tax assets	463,333	518,447
Less: Valuation allowance	(127,095)	(132,624)
Net deferred tax assets	336,238	385,823
Total deferred taxes, net	$ (133,617)	$ (140,693)

The sum of the tax effects as of the balance sheet date of the amount of excesses of tax deductions over gross income in a year which cannot be used on the tax returns in the current year but can be carried forward to reduce taxable income or income taxes payable in a future year, for which there must be sufficient tax-basis income to utilize a portion or all of the carryforward amount to realize the deferred tax asset and the tax effect as of the balance sheet date of the amount of future tax deductions arising from all unused tax credit carryforwards which have been reduced by a valuation allowance.

No definition available.