Restructuring Charges (Details) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2013
Changes in the restructuring accrual
Balance of restructuring accrual at the beginning of the period	$ 3,142,000
Restructuring charges	2,959,000
Cash payments	(5,856,000)
Balance of restructuring accrual at the end of the period	245,000	245,000
Total restructuring charges expected upon completion	7,000,000
Accrued liabilities, current
Changes in the restructuring accrual
Balance of restructuring accrual at the end of the period	200,000	200,000
Facility Exit Costs
Changes in the restructuring accrual
Balance of restructuring accrual at the beginning of the period	4,000
Restructuring charges	96,000
Balance of restructuring accrual at the end of the period	100,000	100,000
Severance and Benefits
Restructuring Charges
Total recognized cost		6,600,000
Changes in the restructuring accrual
Balance of restructuring accrual at the beginning of the period	3,138,000
Restructuring charges	2,863,000
Cash payments	(5,856,000)
Balance of restructuring accrual at the end of the period	$ 145,000	$ 145,000