Equity-Based Compensation (Details Of Compensation Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee equity-based compensation expense	$ 1,059	$ 1,097	$ 3,057	$ 3,144
Related net income tax benefit	0	0	0	0
Director deferred compensation expense (income)	1,126	(373)	1,553	484
Performance shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee equity-based compensation expense	891	942	2,598	2,707
Restricted stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee equity-based compensation expense	$ 168	$ 155	$ 459	$ 437