Business Reorganization (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	9 Months Ended
	Mar. 14, 2014 employee	Sep. 30, 2014
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated	50
Schedule of change in the liability for the 2014 employee termination action
Employee severance costs		$ 5,552
One-time Termination Benefits [Member]
Schedule of change in the liability for the 2014 employee termination action
Employee severance costs		2,167
Employee Severance [Member]
Schedule of change in the liability for the 2014 employee termination action
January 1, 2014		0
Employee severance costs		1,230
Payments		(915)
September 30, 2014		315
Other Restructuring [Member]
Schedule of change in the liability for the 2014 employee termination action
Employee severance costs		3,385
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Expected additional costs	$ 1,000