Earnings Per Share (Schedule Of Earnings Per Share, Basic And Diluted) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share [Abstract]
Net income attributable to controlling interests and available to common stockholders	$ 13,989	$ 15,327	$ 23,554	$ 24,757
Less: undistributed earnings allocated to unvested restricted shares	(49)	(448)	(102)	(666)
Net income available to common stockholders	13,940	14,879	23,452	24,091
Add: Undistributed earnings allocated to restricted shares, Diluted	49	448	102	666
Less: Undistributed earnings reallocated to restricted shares	(49)	(445)	(100)	(662)
Net income available to common stockholders and assumed conversions	$ 13,940	$ 14,882	$ 23,454	$ 24,095
Weighted Average Shares Outstanding, Basic	44,324,747	44,394,230	44,270,363	44,321,069
Stock options added to the denominator under the treasury stock method	125,207	220,791	130,562	226,782
RSUs added to the denominator under the treasury stock method	381,024		399,373
Weighted Average Shares Outstanding, Diluted	44,830,978	44,615,021	44,800,298	44,547,851
Net income per common share - basic	$ 0.31	$ 0.34	$ 0.53	$ 0.54
Net income per common share - diluted	$ 0.31	$ 0.33	$ 0.52	$ 0.54