Selling, General and Administrative Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Selling, General and Administrative Expenses
Selling, general and administrative expenses	$ 147,295	$ 199,194	$ 132,168
Allocated share-based compensation expense	19,530	13,274	(46,684)
Operating Segments
Selling, General and Administrative Expenses
Selling, general and administrative expenses	80,027	131,619	129,335
Corporate
Selling, General and Administrative Expenses
Selling, general and administrative expenses	67,268	67,575	2,833
Allocated share-based compensation expense	$ 19,500	$ 13,300	$ (46,700)