Income per Common Share of the Trust Income per Common Share of the Trust, Dilutive (Details) (Stock Option [Member], Common shares [Member])	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2014	Dec. 31, 2013
Stock Option [Member] | Common shares [Member]
Stock Option Exercises [Line Items]
Amount of Options Exercises in Period	0	43,000	504,000