Short-Term Borrowings (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014 BANK OF AMERICA - MERRILL LYNCH ATS [Member] Revolving Credit Facility [Member]	Mar. 31, 2014 TD Bank [Member] Revolving Credit Facility [Member]	Mar. 31, 2014 Credit Agreement [Member] Revolving Credit Facility [Member]	Nov. 30, 2012 Credit Agreement [Member] BANK OF AMERICA - MERRILL LYNCH ATS [Member]	Mar. 31, 2014 Credit Agreement [Member] BANK OF AMERICA - MERRILL LYNCH ATS [Member] Revolving Credit Facility [Member]	Dec. 31, 2013 Credit Agreement [Member] BANK OF AMERICA - MERRILL LYNCH ATS [Member] Revolving Credit Facility [Member]	Mar. 31, 2014 Minimum [Member] Credit Agreement [Member] Revolving Credit Facility [Member]	Mar. 31, 2014 Maximum [Member] Credit Agreement [Member] Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity				$ 75.0
Overdraft facility				5.0
Borrowings outstanding			10.3			2.8
Letters of credit outstanding	3.1	0.4				3.1
Remaining borrowing capacity					$ 61.6	$ 69.1
Debt Instrument, Interest Rate, Effective Percentage							1.40%	1.96%