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Income Taxes Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Deferred Tax Assets: |  |
Stock-based compensation expense | $ 24,125 | $ 24,725
Foreign and state net operating loss carryforward and FTC | 74,358 | 71,236
Basis differences in investments | 4,118 | 4,191
Federal benefit of state tax deduction for uncertain tax positions | 1,882 | 1,918
Revenue and expense recognized in different periods for financial reporting and income tax purposes | 1,657 | 2,631
Other assets | 1,049 | 273
Total deferred income tax assets | 107,189 | 104,974
Less: valuation allowance | (72,316) | (68,469)
Net deferred income tax assets | 34,873 | 36,505
Deferred Tax Liabilities: |  |
Capitalized software currently deductible for tax purposes, net of amortization | (71,067) | (70,575)
Difference in financial reporting and income tax depreciation methods | (6,545) | (3,182)
Difference between book and tax basis of other assets | (4,429) | (3,549)
Goodwill and other intangibles | (1,823) | (1,001)
Foreign Dividend Withholding Tax | (312) | (3,199)
Capitalized contract costs | (5,490) | 0
Other liabilities | (960) | (704)
Total deferred income tax liabilities | (90,626) | (82,210)
Net deferred income tax liabilities | $ (55,753) | $ (45,705)

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