Earnings Per Share (Schedule Of Earnings Per Share, Basic And Diluted) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Earnings Per Share [Abstract]
Net income attributable to controlling interests and available to common stockholders	$ 7,467	$ (8,408)	$ 15,327	$ 9,430	$ 11,201	$ 12,897	$ 9,664	$ 9,829	$ 23,816	$ 43,591	$ 70,233
Less: undistributed earnings allocated to unvested restricted shares									(672)	(1,497)	(2,626)
Net income available to common stockholders									23,144	42,094	67,607
Add: Undistributed earnings allocated to restricted shares, Diluted									672	1,497	2,626
Less: Undistributed earnings reallocated to restricted shares									(669)	(1,483)	(2,586)
Net income available to common stockholders and assumed conversions									$ 23,147	$ 42,108	$ 67,647
Weighted Average Shares Outstanding, Basic									44,371,313	43,469,175	42,201,491
Stock options added to the denominator under the treasury stock method									206,322	406,157	685,289
Weighted Average Shares Outstanding, Diluted									44,577,635	43,875,332	42,886,780
Net income per common share - basic	$ 0.16	$ (0.19)	$ 0.34	$ 0.21	$ 0.25	$ 0.29	$ 0.22	$ 0.22	$ 0.52	$ 0.97	$ 1.60
Net income per common share - diluted	$ 0.16	$ (0.19)	$ 0.33	$ 0.21	$ 0.25	$ 0.28	$ 0.21	$ 0.22	$ 0.52	$ 0.96	$ 1.58