Financing Activity (Tables)

3 Months Ended

Mar. 31, 2016

Debt Disclosure [Abstract]

Schedule of credit facility interest expense [Table Text Block]

		Three Months Ended March 31,
(in thousands of dollars)		2016		2015
2013 Revolving Facility
	Interest expense	$	690.1	$	380.9
	Deferred financing amortization	198.7		358.0
Term Loans
	Interest expense	2,991.9		1,257.2
	Deferred financing amortization	119.9		76.4

Applicable Credit Spread Over Libor at Various Leverage Levels

		Applicable Margin
Level	Ratio of Total Liabilities to Gross Asset Value	2013 Revolving Facility		2014 7-Year Term Loan		2014 5-Year Term Loan		2015 5-Year Term Loan
1	Less than 0.450 to 1.00	1.20%		1.80%		1.35%		1.35%
2	Equal to or greater than 0.450 to 1.00 but less than 0.500 to 1.00	1.25%	(1)	1.95%	(1)	1.45%	(1)	1.45%	(1)
3	Equal to or greater than 0.500 to 1.00 but less than 0.550 to 1.00	1.30%		2.15%		1.60%		1.60%
4	Equal to or greater than 0.550 to 1.00	1.55%		2.35%		1.90%		1.90%

Carrying and Fair Values of Mortgage Loans

The carrying values and estimated fair values of mortgage loans based on interest rates and market conditions at March 31, 2016 and December 31, 2015 were as follows:

	March 31, 2016				December 31, 2015
(in millions of dollars)	Carrying Value		Fair Value		Carrying Value		Fair Value
Mortgage loans	$	1,247.2	$	1,267.1	$	1,321.3	$	1,323.3