Accrued And Other Liabilities (Schedule Of Accrued Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accrued And Other Liabilities [Abstract]
Compensation and benefits	$ 22,771	$ 24,152
Vendor accruals	8,231	12,883
Accrued professional fees	810	491
Accrued taxes	9,831	11,317
Royalties payable	2,092	1,431
Accrued interest	39	42
Accrued earnouts related to acquisitions	3,238	159
Accrued other	2,956	4,224
Total	$ 49,968	$ 54,699