Valuation and Qualifying Accounts (Tables)

12 Months Ended

Dec. 31, 2012

Valuation and Qualifying Accounts [Abstract]

Summary of changes in valuation and qualifying accounts

The following table summarizes the changes in our valuation and qualifying accounts:

(In thousands)	Balance at Beginning of Year		Charges (credits) to Cost and Expenses			Recoveries			Write-Offs			Balance at end of Year
Reserves in accounts receivable:
December 31, 2010		2,329		(72	)		(36	)		(581	)		1,640
December 31, 2011		1,640		618			22			(1,604	)		676
December 31, 2012		676		267			(277	)		(117	)		549