Accounts Payable And Accrued Expenses (Schedule Of Accounts Payable And Accrued Expenses) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Payables and Accruals [Abstract]
Accounts payable and accrued liabilities	$ 32,771	$ 23,788
Payable to benefit providers and transit agencies	30,148	32,469
Accrued compensation and related benefits	28,594	25,921
Other accrued expenses	5,834	5,275
Deferred revenue	2,507	2,524
Accounts payable and accrued expenses	$ 99,854	$ 89,977