Stock Options And Restricted Stock (Schedule Of Components Of Share Based Compensation Expense) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shared based compensation expense	$ 5,263		$ 1,459		$ 985
Options [Member] | CEO [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shared based compensation expense					57
Restricted Shares [Member] | Officers And Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shared based compensation expense	4,848	[1]	1,185	[1]	747	[1]
Restricted Shares [Member] | Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shared based compensation expense	$ 415		$ 274		$ 181

[1] Includes grants to employees of the Company's Manager prior to Internalization.