Earnings Per Share (Schedule Of Earnings Per Share, Basic And Diluted) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Earnings Per Share [Abstract]
Net income attributable to controlling interests and available to common stockholders	$ 9,430	$ 9,829
Less: undistributed earnings allocated to unvested restricted shares	(231)	(334)
Net income available to common stockholders	9,199	9,495
Weighted Average Shares Outstanding, Basic	44,247,098	43,058,215
Earnings Per Share, Basic	$ 0.21	$ 0.22
Add: Undistributed earnings allocated to restricted shares, Diluted	231	334
Stock options added to the denominator under the treasury stock method	232,268	504,403
Less: Undistributed earnings reallocated to restricted shares	(230)	(330)
Net income available to common stockholders and assumed conversions	$ 9,200	$ 9,499
Weighted Average Shares Outstanding, Diluted	44,479,366	43,562,618
Earnings Per Share, Diluted	$ 0.21	$ 0.22