Real Estate Activities (Tables)

3 Months Ended

Mar. 31, 2018

Real Estate [Abstract]

Investments in Real Estate

Investments in real estate as of March 31, 2018 and December 31, 2017 were comprised of the following:

(in thousands of dollars)	As of March 31, 2018			As of December 31, 2017
Buildings, improvements and construction in progress	$	2,811,636		$	2,808,622
Land, including land held for development	500,704			491,080
Total investments in real estate	3,312,340			3,299,702
Accumulated depreciation	(1,141,914		)	(1,111,007		)
Net investments in real estate	$	2,170,426		$	2,188,695

Real Estate Capitalized Costs [Table Text Block]

The following table summarizes our capitalized interest, compensation, including commissions, and real estate taxes for the three months ended March 31, 2018 and 2017:

	Three Months Ended   March 31,
(in thousands of dollars)	2018		2017
Development/Redevelopment Activities:
Interest	$	1,625	$	1,431
Compensation, including commissions	438		348
Real estate taxes	164		93
Leasing Activities:
Compensation, including commissions	2,172		1,667