Cash Flow Information - Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Supplemental Cash Flow Elements [Abstract]
Cash paid for income taxes	$ 26,464	$ 27,191	$ 8,698
Cash paid for interest	$ 36,085	$ 21,899	$ 0