Income Taxes - Provision for Income Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule of provision for income taxes
Current income tax expense	$ 76,535	$ 84,454	$ 81,689
Deferred income tax expense (benefit)	3,349	(1,358)	26,912
Other income tax expense	0	0	10,095
Income tax expense	$ 79,884	$ 83,096	$ 118,696