Accrued Expenses (Schedule Of Accrued Expenses) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accrued Expenses [Abstract]
Accrued earnouts	$ 4,128	$ 7,230
Salaries and benefits	11,910	14,253
Real estate and property taxes	7,644	7,899
Other	37,447	34,373
Total accrued expenses	$ 61,129	$ 63,755