Borrowings -Multicurrency Revolving Credit Facility (Details)	3 Months Ended	0 Months Ended		3 Months Ended			0 Months Ended	3 Months Ended			0 Months Ended
	Mar. 31, 2015	Oct. 23, 2014 Overdraft Facility	Oct. 23, 2014 Overdraft Facility USD ($)	Mar. 31, 2015 Multicurrency Revolving Credit Facility Revolving Credit Facility SEK	Mar. 31, 2015 Multicurrency Revolving Credit Facility Revolving Credit Facility USD ($)	Mar. 31, 2015 Overdraft Facility Revolving Credit Facility USD ($)	Oct. 23, 2014 Line of Credit Multicurrency Revolving Credit Facility Revolving Credit Facility	Mar. 31, 2015 Line of Credit Multicurrency Revolving Credit Facility Revolving Credit Facility USD ($)	Dec. 31, 2014 Line of Credit Multicurrency Revolving Credit Facility Revolving Credit Facility USD ($)	Oct. 23, 2014 Line of Credit Multicurrency Revolving Credit Facility Revolving Credit Facility USD ($)	Oct. 23, 2014 Minimum Interbank Offered Rate (IBOR) Overdraft Facility	Oct. 23, 2014 Minimum Interbank Offered Rate (IBOR) Line of Credit Multicurrency Revolving Credit Facility Revolving Credit Facility	Oct. 23, 2014 Maximum Interbank Offered Rate (IBOR) Overdraft Facility	Oct. 23, 2014 Maximum Interbank Offered Rate (IBOR) Line of Credit Multicurrency Revolving Credit Facility Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$ 40,000,000							$ 500,000,000
Remaining borrowing capacity					128,300,000	13,300,000
Basis spread variable rate											250.00%	250.00%	3.00%	3.00%
Unused commitment fee	0.375%						0.35%
Facility line fee		0.50%
Percentage of maximum level of borrowings of ERC of eligible asset pools				28.00%
Debt instrument, covenant, maximum GIBD								250.00%
Debt Instrument, covenant, interest bearing deposits, maximum				500,000,000
Debt Instrument, covenant, minimum cash collection exceeding IFRS forecast				95.00%
Long-term debt, gross								$ 398,438,000	$ 427,680,000
Interest rate at period end								3.12%