Business Reorganization (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	6 Months Ended
	Mar. 14, 2014 employee	Jun. 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		$ 5,052
One-time Termination Benefits [Member]
Schedule of change in the liability for the 2014 employee termination action
Employee severance costs		2,112
Employee Severance [Member]
Schedule of change in the liability for the 2014 employee termination action
January 1, 2014		0
Employee severance costs		1,166
Payments		(681)
June 30, 2014		485
Other Restructuring [Member]
Schedule of change in the liability for the 2014 employee termination action
Employee severance costs		2,940
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Expected additional costs	$ 1,500