Business Acquisitions Acquired Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended	0 Months Ended
	Dec. 31, 2014	Apr. 30, 2014
Business Acquisition [Line Items]
Useful Life (Yrs)	5 years
PECO and FGC Acquisitions [Member]
Business Acquisition [Line Items]
Amount		$ 5,158
Useful Life (Yrs)		5 years 3 months 18 days
PECO and FGC Acquisitions [Member] | Order backlog [Member]
Business Acquisition [Line Items]
Amount		1,172
Useful Life (Yrs)		1 year
PECO and FGC Acquisitions [Member] | Trademarks [Member]
Business Acquisition [Line Items]
Amount		90
Useful Life (Yrs)		2 years
PECO and FGC Acquisitions [Member] | Customer relationships [Member]
Business Acquisition [Line Items]
Amount		870
Useful Life (Yrs)		4 years
PECO and FGC Acquisitions [Member] | Developed technology rights [Member]
Business Acquisition [Line Items]
Amount		3,230
Useful Life (Yrs)		7 years
PECO and FGC Acquisitions [Member] | Net assumed contractual obligations [Member]
Business Acquisition [Line Items]
Amount		$ (204)
Useful Life (Yrs)		1 year