Deferred Costs (Details Textuals) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Deferred Costs (Textuals) [Abstract]
Capitalized Internal Direct Leasing Costs	$ 2.0	$ 1.8	$ 4.0	$ 3.9