Restructuring Charges Restructuring Charges (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2012 position	Mar. 31, 2014 Employee Separation Costs	Mar. 31, 2013 Employee Separation Costs
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated	160
Costs incurred and charged to expense		$ 1,216	$ 1,382
Restructuring Reserve [Roll Forward]
Accrued liability beginning balance		756
Costs incurred and charged to expense, excluding non-cash charges		1,216
Cash payments		(1,856)
Accrued liability ending balance		$ 116