Borrowings (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013
Revolving credit facilities
Borrowings
Maximum borrowing capacity	$ 60
Amount of borrowing subject to the bank's dominion	3.2
Amount outstanding	17.6
Line of Credit Facility, Current borrowing base	50.5
Term loans
Borrowings
Term Loan, face amount	$ 7.5