Equity-Based Compensation (Aggregate Intrinsic Value Of Options Exercised And Aggregate Fair Value Of Restricted Stock Units And Restricted Shares That Vested) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value of options exercised	$ 115	$ 13	$ 128
Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate fair value of vested share-based payment award	193	155	150
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate fair value of vested share-based payment award	$ 2,760	$ 2,356	$ 3,040