Accounting for Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2019	Dec. 31, 2018
Income Tax Contingency [Line Items]
Provision for income taxes	$ 43,121	$ 7,703	$ 51,917	$ 10,605
Effective income tax rate, continuing operations	22.20%	6.60%	18.60%	4.90%
Effective Income Tax Rate Reconciliation, Excess Tax Benefit Amount			$ 1,200	$ 13,100
Unrecognized tax benefits	$ 42,700		42,700			$ 33,300
Accrued penalties and interest	$ 0		$ 0
Undistributed earnings of foreign subsidiaries						533,500
Amount of no longer indefinitely reinvested foreign earnings						239,200
Amount of indefinitely reinvested foreign earnings						$ 294,300
National Corporate Tax Rate						30.00%
Scenario, Forecast | Subsequent Event
Income Tax Contingency [Line Items]
National Corporate Tax Rate					30.00%