Facility Restructuring Charge (Details) (Closure of facilities, USD $) In Thousands, unless otherwise specified	0 Months Ended	3 Months Ended	21 Months Ended	3 Months Ended			21 Months Ended
	Mar. 12, 2013 item	Dec. 31, 2013	Sep. 30, 2014	Dec. 31, 2013 Workforce Reductions	Dec. 31, 2013 Facility Costs	Sep. 30, 2013 Facility Costs	Sep. 30, 2014 Accelerated depreciation
Facility restructuring charge
Expected number of facilities to be eliminated	7
Cumulative charges			$ 32,695				$ 12,588
Reconciliation of charges to accrued expenses
Restructuring accrual at the beginning of the period		15,085		12,436	2,649	2,649
Cash payments		(3,314)		(3,314)
Restructuring accrual at the end of the period		$ 11,771		$ 9,122	$ 2,649	$ 2,649