Equity-Based Compensation (Details Of Equity-Based Compensation Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee equity-based compensation expense	$ 1,222	$ 1,182	$ 2,176	$ 2,259
Deferred compensation stock equivalent units expense	220	47	420	166
Total tax benefit recognized for share-based expense	89	78	155	152
Performance shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee equity-based compensation expense	951	950	1,705	1,822
Restricted stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee equity-based compensation expense	$ 271	$ 232	$ 471	$ 437