Derivative Instruments and Hedging Activities (Details 4) (USD $)	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 Forward starting swap	Dec. 31, 2013 Forward starting swap	Mar. 31, 2014 Forward starting swap item	Mar. 31, 2014 Forward starting swap Minimum	Mar. 31, 2014 Foreign currency forwards	Mar. 31, 2013 Foreign currency forwards	Mar. 31, 2014 Foreign currency forwards	Mar. 31, 2013 Foreign currency forwards
Derivative instruments and hedging activities
Debt to be issued under derivative contacts								$ 83,000,000
Term of debt to be issued							10 years
Term of derivative contract							10 years
Number of semi-annual interest cash flows							20
Notional Principal outstanding derivative instruments					56,000,000		56,000,000
Fixed rate (as a percent)					1.881%		1.881%
Variable rate basis							3-month LIBOR
Number of days prior to the first day of each calculation period							2 days
Minimum commitment amount for hedging									50,000		50,000
Fair value of derivative immediately prior to the modification						1,000,000
Change in the fair value of derivative					(600,000)	400,000
Derivative gain reclassified into earnings	$ 84,000	$ 20,000	$ 35,000	$ (2,052,000)					$ 84,000	$ 20,000	$ 35,000	$ (2,052,000)