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Restructuring Charges (Narrative) (Details) (USD $)	1 Months Ended	3 Months Ended		6 Months Ended
Restructuring Charges (Narrative) (Details) (USD $)	Jan. 31, 2013	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Restructuring Charges [Abstract]
Expected reduction of expenses	$ 30,000,000
Restructuring charges		1,758,000	1,393,000	6,607,000	2,252,000
Accrued liabilities		$ 3,100,000		$ 3,100,000

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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