Business Reorganization (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	3 Months Ended
	Mar. 14, 2014	Mar. 31, 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 termination benefit costs	$ 2,750
One-time Termination Benefits [Member]
Schedule of change in the liability for the 2014 employee termination action
Employee termination benefit costs	2,112
Employee Severance [Member]
Schedule of change in the liability for the 2014 employee termination action
January 1, 2014		0
Employee termination benefit costs	1,174	1,174
Payments		0
March 31, 2014		1,174
Other Restructuring [Member]
Schedule of change in the liability for the 2014 employee termination action
Employee termination benefit costs	638
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Expected additional costs	$ 5,000