520 Broad Street Building and Note Payable (Details) (USD $) In Millions, unless otherwise specified		1 Months Ended
	Apr. 30, 2013	May 31, 2013 Subsequent Event [Member]
520 Broad Street Building (Textual)
Amount paid for release mortgage on assets		$ 21.1
Gain or loss on termination of notes payable		0.2
Carrying value of the land, building and improvements	42.4
Note payable	21.3
Reserve and escrow balance	$ 0.6