Income Taxes - Components of Income Tax Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current tax expense:
U.S. federal	$ 30,208	$ 2,817	$ 48,339
State and local	11,630	6,969	434
Foreign	53,105	45,042	38,602
Total current	94,943	54,828	87,375
Deferred tax (benefit) expense:
U.S. federal	(16,389)	12,462	(176,046)
State and local	(6,897)	1,258	(14,363)
Foreign	(48,186)	(13,795)	(25,898)
Total deferred	(71,472)	(75)	(216,307)
Total current and deferred	23,471	54,753	(128,932)
Total tax expense (benefit)	42,449	58,665	(131,096)
Benefit (expense) relating to interest rate swaps used to increase (decrease) equity
Deferred tax (benefit) expense:
Other tax benefit (expense)	17,666	3,840	(2,477)
Benefit from stock transactions with employees used to increase equity
Deferred tax (benefit) expense:
Other tax benefit (expense)	54	58	46
Benefit relating to defined-benefit pension adjustments used to increase equity
Deferred tax (benefit) expense:
Other tax benefit (expense)	$ 1,258	$ 14	$ 267