Lease Commitments - Textual (Details) (Europe [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Europe [Member]
Operating Leased Assets [Line Items]
Operating leases, maximum increase allowable	5.00%
Operating leases, rent expense	$ 6.3	$ 6.8	$ 6.4

Rental expense incurred for leased assets including furniture and equipment which has not been recognized in costs and expenses applicable to sales and revenues; for example, cost of goods sold or other operating costs and expenses.

No definition available.

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration