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Restructuring Expense (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Restructuring activities
Lease restructuring liability at beginning of period	$ 26,313	$ 29,595
Cash payments	(3,686)	(3,736)
Cash received from subleases	2,486	2,195
Restructuring expense	360	760
Lease restructuring liability at end of period	$ 25,473	$ 28,814

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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- Definition

Amount of cash paid in the period to fully or partially settle a specified, previously accrued type of restructuring cost.

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