Common Stock And Accumulated Other Comprehensive Income (Loss) - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash Flow Hedges
Balance at beginning of the year	$ 218	$ 3,522	$ 3,474
OCI (loss)	(11,647)	(3,417)
OCI (loss)			2,098
Income taxes	2,365	1,404
Income taxes			(16)
Net OCI (loss)	(7,158)	(4,052)
Net OCI (loss)			48
Reclassification of stranded tax effects		748
Balance at end of the year	(6,940)	218	3,522
Foreign Currency Translation
Balance at beginning of the year	(5,512)	(5,555)	(1,940)
OCI (loss)	7,786	(18)	(3,606)
Income taxes	(786)	61	(9)
Net OCI (loss)	7,000	43	(3,615)
Balance at end of the year	1,488	(5,512)	(5,555)
Total
Balance at beginning of the year	(5,294)	(2,033)	1,534
OCI (loss)	(3,861)	(3,435)	(1,508)
Income taxes	1,579	1,465	(25)
Net OCI (loss)	(158)	(4,009)	(3,567)
Reclassification of stranded tax effects		748
Balance at end of the year	(5,452)	(5,294)	(2,033)
Revenue
Cash Flow Hedges
Reclassifications to	(36)	(577)
Reclassifications to			(136)
Total
Reclassifications to	(36)	(577)	(136)
Cost of sales
Cash Flow Hedges
Reclassifications to	1,288	578
Reclassifications to			(361)
Total
Reclassifications to	1,288	578	(361)
Interest expense
Cash Flow Hedges
Reclassifications to	872	(2,040)
Reclassifications to			(1,537)
Total
Reclassifications to	$ 872	$ (2,040)	$ (1,537)