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Consolidation and Basis of Presentation and Significant Accounting Policies (Tables)
 3 Months Ended
Mar. 31, 2013
Notes To Financial Statements [Abstract]  
Earnings Per Common Share
(dollars and units in thousands, except per unit amounts)
Three months ended March 31,
 
2013
 
2012
Units Outstanding
 
 
 
Weighted average common units - basic and diluted
41,514

 
39,133

 
 
 
 
Calculation of Earnings per Unit - basic and diluted
 

 
 

Income from continuing operations
$
19,718

 
$
12,625

Income from continuing operations attributable to noncontrolling interests
(159
)
 
(83
)
Income from continuing operations available for common unitholders, adjusted
$
19,559

 
$
12,542

 
 
 
 
Income from discontinued operations
$
—

 
$
9,859

Income from discontinued operations attributable to noncontrolling interests
—

 
(65
)
Income from discontinued operations available for common unitholders, adjusted
$
—

 
$
9,794

 
 
 
 
Earnings per unit - basic and diluted:
 
 
 
Income from continuing operations available for common unitholders
$
0.47

 
$
0.32

Income from discontinued operations available for common unitholders
—

 
0.25

Net income available for common unitholders
$
0.47

 
$
0.57