Stock Compensation (Summary Of Total Stock Compensation Expenses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	$ 2,620	$ 1,693	$ 7,039	$ 5,051
RSA, RSU, And PSU Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	2,133	1,281	5,579	3,750
Stock Option And ESPP Option Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	$ 487	$ 412	$ 1,460	$ 1,301