Segment and Geographical Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
Apr. 01, 2012	Apr. 03, 2011	Jan. 01, 2012
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Revenue	$ 494,131	$ 451,418	$ 2,374,376
Cost of revenue	448,883	362,896	2,148,157
Gross margin	45,248	88,522	226,219
Amortization of other intangible assets	2,782	7,064
Allocated Share-based Compensation Expense	12,541	13,163
Non-cash interest expense	7,099	7,325
Americas [Member]
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Revenue	281,493	203,910
Cost of revenue	242,119	172,882
Utility and Power Plant Project Revenue	(86,203)	0
Cost of Revenue, Utility and power Plant Project	(70,445)	0
Amortization of other intangible assets	41	274
Allocated Share-based Compensation Expense	1,129	604
Acquisition and integration costs	4	0
Change in European government incentives	4,292	0
Non-cash interest expense	218	415
Gross Profit As a Percentage of Total Revenues	14.00%	15.00%
Americas CODM [Member]
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Revenue	367,696	203,910
Cost of revenue	306,880	171,589
Gross Profit As a Percentage of Total Revenues	17.00%	16.00%
EMEA [Member]
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Revenue	156,110	200,501
Cost of revenue	156,845	156,709
Utility and Power Plant Project Revenue	193	0
Amortization of other intangible assets	808	21
Allocated Share-based Compensation Expense	965	1,192
Change in European government incentives	3,473	0
Non-cash interest expense	176	511
Gross Profit As a Percentage of Total Revenues	0.00%	22.00%
EMEA CODM [Member]
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Revenue	155,917	200,501
Cost of revenue	151,423	154,985
Gross Profit As a Percentage of Total Revenues	3.00%	23.00%
APAC [Member]
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Revenue	56,528	47,007
Cost of revenue	49,919	33,305
Allocated Share-based Compensation Expense	265	125
Change in European government incentives	1,280	0
Non-cash interest expense	65	108
Gross Profit As a Percentage of Total Revenues	12.00%	29.00%
APAC CODM [Member]
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Cost of revenue	$ 48,309	$ 33,072
Gross Profit As a Percentage of Total Revenues	15.00%	30.00%

Cost of Revenue, Utility and power Plant Project

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Gross Profit As a Percentage of Total Revenues.

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Impact of change in foreign government incentives

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Utility and Power Plant Project Revenue

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No definition available.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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The component of interest expense representing the noncash expenses charged against earnings in the period to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate caption: Noncash Interest Expense.

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-Name Regulation S-X (SX)

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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-Name Accounting Standards Codification

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- Definition

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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The aggregate cost of goods produced and sold and services rendered during the reporting period.

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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