Debt (Aggregate Borrowing Information) (Details) (Financial Services [Member], USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Financial Services [Member]
Line of Credit Facility [Line Items]
Available credit lines	$ 150,000,000	$ 150,000,000	$ 2,500,000
Unused credit lines	$ 44,336,000	$ 11,205,000	$ 2,500,000
Weighted-average interest rate	2.90%	3.00%	4.50%