CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Operating activities:
Net loss	$ (78.0)	$ (37.2)	$ (114.4)
Loss from discontinued operations	0	(5.3)	(1.5)
Loss from continuing operations	(78.0)	(31.9)	(112.9)
Adjustments to reconcile net loss from continuing operations to net cash provided by operating activities from continuing operations:
Depreciation and amortization	39.1	53.4	58.0
Deferred income taxes	2.3	(0.4)	(2.5)
Stock-based compensation	3.8	7.4	6.6
Impairment of goodwill and intangible assets	0	0	96.6
Loss on extinguishment of debt	39.1	0	0
Amortization of deferred financing costs	3.2	5.1	5.1
Amortization of premium and discount on Senior Secured Notes	(0.9)	(4.2)	(4.2)
Provision for doubtful accounts	1.5	1.0	0.4
Change in accrual for excess facilities	0.2	(4.7)	1.8
Changes in assets and liabilities, net of acquisitions:
Accounts receivable	16.1	4.9	2.8
Inventoried costs	6.5	20.0	(5.2)
Prepaid expenses	2.2	1.9	(1.7)
Other assets	1.4	(7.0)	(0.2)
Accounts payable	(13.5)	(22.0)	25.6
Accrued expenses	(12.1)	(0.7)	(10.3)
Accrued compensation	1.4	(3.0)	4.3
Accrued interest	0.4	(1.1)	1.2
Billings in excess of costs and earnings on uncompleted contracts	(2.4)	8.8	(5.0)
Income tax receivable and payable	0.8	1.6	(0.7)
Other liabilities	(3.4)	(6.5)	(7.4)
Net cash provided by operating activities from continuing operations	7.7	22.6	52.3
Investing activities:
Cash paid for acquisitions, net of cash acquired	(2.6)	2.2	(149.4)
Proceeds from the disposition of discontinued operations	0	1.3	0.3
Cash transferred from (to) restricted cash	(0.4)	0.4	0.6
Capital expenditures	(14.2)	(16.6)	(16.6)
Net cash used in investing activities from continuing operations	(17.2)	(12.7)	(165.1)
Financing activities:
Proceeds from the issuance of long-term debt, net of issuance costs	618.5	0	0
Extinguishment of long-term debt	(661.5)	0	0
Proceeds from the issuance of common stock, net of issuance costs	0	0	97.0
Borrowing under credit facility	41.0	0	50.0
Repayments under credit facility	(1.0)	(1.0)	(51.0)
Cash paid for contingent acquisition consideration	0	(2.1)	(2.5)
Debt issuance costs	(10.0)	0	(1.2)
Proceeds from exercise of restricted stock units, employee stock options, and employee stock purchase plan	3.3	1.5	0
Other	0	(0.4)	(1.4)
Net cash provided by (used in) financing activities from continuing operations	(9.7)	(2.0)	90.9
Net cash flows of continuing operations	(19.2)	7.9	(21.9)
Net operating cash flows of discontinued operations	(1.6)	(1.3)	1.3
Effect of exchange rate changes on cash and cash equivalents	(0.2)	0.1	0
Net increase (decrease) in cash and cash equivalents	(21.0)	6.7	(20.6)
Cash and cash equivalents at beginning of year	55.7	49.0	69.6
Cash and cash equivalents at end of year	34.7	55.7	49.0
Supplemental disclosure of cash flow information:
Cash paid during the year for interest	57.1	63.8	64.0
Net cash paid during the year for income taxes	1.2	0.2	2.7
Non-cash investing and financing activities:
Common stock and stock options issued for acquisitions	0	0	23.8
Liability for contingent cash consideration	0	0	2.1
Supplemental disclosures of non-cash investing and financing transactions:
Fair value of assets acquired in acquisitions	0	0	218.3
Liabilities assumed in acquisitions	$ 0	$ 0	$ 35.2