Business Reorganization (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2014 employee	Dec. 31, 2014 USD ($)
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | employee	50
Restructuring and related costs		$ 6,020
One-time Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs		2,182
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs		$ 3,838