Stockholders' Equity - Narrative (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	6 Months Ended		0 Months Ended
	Feb. 11, 2011	Jun. 24, 2012	Jun. 26, 2011	Mar. 08, 2012 Common stock	Mar. 08, 2012 Series B Convertible Preferred Stock Preferred stock	May 14, 2012 Composite Engineering, Inc.
Class of Stock [Line Items]
Common stock issued to fund purchase of CEI (shares)						20,000,000
Common stock issued for cash	4,900,000	20,000,000	4,900,000
Purchase price per share	$ 13.25					$ 5.00
Gross proceeds from issuance of common stock	$ 64.8					$ 100.0
Proceeds from the issuance of common stock	$ 61.1	$ 97.0	$ 61.1			$ 97.0
Preferred stock redeemed during period - shares					10,000
Common stock issued as consideration in redemption of Series B Convertible Preferred Stock - shares				100,000