Restructuring (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Restructuring charges
Total Restructuring expense	$ 2,828
Changes in the company's liability related to restructuring
Restructuring expense	(2,828)
ClearPoint
Restructuring charges
Non-cash charges	1,035
Total Restructuring expense	2,828
Changes in the company's liability related to restructuring
Restructuring expense	(2,828)
Less: Non-cash charges	(1,035)
Balance at the end of the period	271
ClearPoint | Severance and other compensation
Restructuring charges
Cash charges	1,263
Changes in the company's liability related to restructuring
Payments for restructuring	(1,236)
ClearPoint | Third party vendor contracts
Restructuring charges
Cash charges	99
Changes in the company's liability related to restructuring
Payments for restructuring	(17)
ClearPoint | Legal costs
Restructuring charges
Cash charges	431
Changes in the company's liability related to restructuring
Payments for restructuring	(269)
ClearPoint | Intangible asset impairment
Restructuring charges
Non-cash charges	587
Changes in the company's liability related to restructuring
Less: Non-cash charges	(587)
ClearPoint | Recognition of other deferred charges
Restructuring charges
Non-cash charges	448
Changes in the company's liability related to restructuring
Less: Non-cash charges	$ (448)