Stockholders' Equity - Narrative (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	9 Months Ended		0 Months Ended
	Sep. 29, 2013	Sep. 30, 2012	Jul. 02, 2012 Composite Engineering, Inc.	May 14, 2012 Composite Engineering, Inc.
Business Acquisition [Line Items]
Common stock issued for acquisitions	0	4.0	20.0	20.0
Purchase price per share			$ 5.94	$ 5.00
Gross proceeds from issuance of common stock				$ 100.0
Proceeds from the issuance of common stock	$ 0	$ 97.0		$ 97.0