Restructuring Expenses (Tables)

9 Months Ended

Sep. 30, 2012

Restructuring Expenses [Abstract]

Activity in restructuring liability account

	December 31, 2011								September 30, 2012
	Balance		Provision-net			Usage			Balance
One-time employee termination benefits	$	1,101	$	145		$	(1,238	)	$	8
Lease/rental terminations		448		(12	)		(436	)		—
Relocation, move, other expenses		116		105			(221	)		—
Total	$	1,665	$	238		$	(1,895	)	$	8