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Supplemental Discloure of Cash Flow Information (Tables)
 12 Months Ended
Dec. 31, 2017
Supplemental Cash Flow Elements [Abstract]  
Cash Flow, Supplemental Disclosures [Text Block]
16. Supplemental Disclosure of Cash Flow Information

The following table presents certain supplemental cash flow information:
 
Year Ended December 31,
 
2017
 
2016
 
2015
 
(Dollars in thousands)
Supplemental disclosures of cash flow information
 
 
 
 
 
Interest paid, net of amounts capitalized
$
—

 
$
—

 
$
—

Income taxes paid
$
14,050

 
$
13,670

 
$
11,261

Supplemental disclosures of noncash transactions
 
 
 
 
 
Purchase of real estate with notes payable to affiliate
$
—

 
$
—

 
$
747

Contribution of real estate to unconsolidated joint ventures
$
—

 
$
798

 
$
18,828

Contribution of real estate from noncontrolling interest in subsidiary
$
—

 
$
—

 
$
1,301

Assets assumed from unconsolidated joint ventures
$
26,613

 
$
46,811

 
$
—

Liabilities and equity assumed from unconsolidated joint ventures
$
27,608

 
$
47,197

 
$
—