Accounts Receivable Factoring Receivables Factored and Costs Incurred (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Transfers and Servicing [Abstract]
Total amount of accounts receivable factored without recourse	$ 50,685	$ 94,284	$ 227,193	$ 267,987
Costs incurred on sale of receivables without recourse	$ 162	$ 148	$ 471	$ 473