Restructuring (Narrative) (Details) (USD $) In Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2010	Jun. 30, 2010	Jun. 30, 2011	Dec. 31, 2010
Restructuring
Pre-tax restructuring expenses related to 2009 restructuring initiative	$ 1,031	$ 2,898
Restructuring accruals			$ 1,041	$ 3,543

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan, excluding costs or losses pertaining to an entity newly acquired in a business combination and to asset retirement obligations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 95-3

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 5
-Section P
-Subsection 3, 4

Name:	us-gaap_RestructuringReserve
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant