Income Taxes	3 Months Ended
Mar. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For the three months ended March 31, 2018, income tax expense was $56.9 million, representing an effective tax rate of 26%. The effective tax rate differs from the federal statutory rate of 21% due primarily to tax expense of $16.4 million for an increase in valuation allowances for foreign taxes and U.S. foreign tax credits, tax benefit of $8.3 million for the one-time rate change on deferred tax assets and liabilities that resulted from the extension of certain television production cost deductions included in the Bipartisan Budget Act of 2018 (enacted February 9, 2018), tax benefit from foreign subsidiary earnings indefinitely reinvested outside the U.S. of $4.9 million and state income tax expense of $3.8 million. For the three months ended March 31, 2017, income tax expense was $73.1 million, representing an effective tax rate of 34%. The effective tax rate differs from the federal statutory rate of 35% due primarily to tax benefit from domestic production activities deduction of $5.9 million, tax benefit from foreign subsidiary earnings indefinitely reinvested outside the U.S. of $4.1 million, state income tax expense of $3.4 million and tax expense of $2.3 million for an increase in valuation allowances for foreign taxes. At March 31, 2018, the Company had foreign tax credit carry forwards of approximately $15.6 million, expiring on various dates from 2024 through 2025. These carryforwards have been reduced by a valuation allowance of $15.6 million as it is more likely than not that these carry forwards will not be realized. For the three months ended March 31, 2018, $0.3 million relating to amortization of tax deductible second component goodwill was realized as a reduction in tax liability (as determined on a 'with-and-without' approach).

Income Taxes

For the three months ended March 31, 2018, income tax expense was $56.9 million, representing an effective tax rate of 26%. The effective tax rate differs from the federal statutory rate of 21% due primarily to tax expense of $16.4 million for an increase in valuation allowances for foreign taxes and U.S. foreign tax credits, tax benefit of $8.3 million for the one-time rate change on deferred tax assets and liabilities that resulted from the extension of certain television production cost deductions included in the Bipartisan Budget Act of 2018 (enacted February 9, 2018), tax benefit from foreign subsidiary earnings indefinitely reinvested outside the U.S. of $4.9 million and state income tax expense of $3.8 million.

For the three months ended March 31, 2017, income tax expense was $73.1 million, representing an effective tax rate of 34%. The effective tax rate differs from the federal statutory rate of 35% due primarily to tax benefit from domestic production activities deduction of $5.9 million, tax benefit from foreign subsidiary earnings indefinitely reinvested outside the U.S. of $4.1 million, state income tax expense of $3.4 million and tax expense of $2.3 million for an increase in valuation allowances for foreign taxes.

At March 31, 2018, the Company had foreign tax credit carry forwards of approximately $15.6 million, expiring on various dates from 2024 through 2025. These carryforwards have been reduced by a valuation allowance of $15.6 million as it is more likely than not that these carry forwards will not be realized. For the three months ended March 31, 2018, $0.3 million relating to amortization of tax deductible second component goodwill was realized as a reduction in tax liability (as determined on a 'with-and-without' approach).