Summary of Significant Accounting Policies - Supplementary Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Interest paid	$ 14,347	$ 63,935	$ 68,332
Income taxes paid	2,100	5,633	7,274
Accrued capital expenditures at year end	$ 7,491	$ 1,573	$ 3,625