Accrued And Other Liabilities (Schedule Of Accrued Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Payables and Accruals [Abstract]
Compensation and benefits	$ 18,281	$ 21,139
Vendor accruals	10,665	9,734
Payable to owners of redeemable noncontrolling interests	0	10,000
Accrued taxes	8,661	9,840
Accrued other	5,159	4,223
Arbitration awards	2,256	2,256
Product warranty liability	2,677	2,908
Accrued professional fees	1,500	1,545
Royalties payable	1,604	1,450
Total	$ 50,803	$ 63,095