Disclosure about Fair Value of Financial Instruments (Details 1) (USD $)	Mar. 31, 2015		Dec. 31, 2014
The Market approach utilized to measure fair value of financial assets and liabilities on recurring basis
Available-for-sale equity investments	$ 46,740,000	[1]	$ 0
Foreign currency forward contracts	72,671,000	[2]
Redeemable OP unitholder interests	47,147,000		46,722,000
Totals	166,558,000
Level 1 [Member]
The Market approach utilized to measure fair value of financial assets and liabilities on recurring basis
Available-for-sale equity investments	46,740,000	[1]
Totals	46,740,000
Level 2 [Member]
The Market approach utilized to measure fair value of financial assets and liabilities on recurring basis
Foreign currency forward contracts	72,671,000	[2]
Redeemable OP unitholder interests	47,147,000
Totals	$ 119,818,000

[1] (1) Unrealized gains or losses on equity investments are recorded in accumulated other comprehensive income (loss) at each measurement date.

[2] (2) Please see Note 11 for additional information.