Income Taxes Effective Income Tax Rate (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Tax [Line Items]
Income tax expense (benefit)	$ 44,239	$ 9,130	$ 46,570	$ 21,021
Income before income taxes	$ 188,990	$ 52,332	$ 187,704	$ 121,639
Effective tax rate	23.00%	17.00%	25.00%	17.00%

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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