Facilities Relocation and Other Transactions Facilities Relocation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		16 Months Ended
	Mar. 31, 2013	Apr. 01, 2012	Mar. 31, 2013
Facilities Relocation and Other Transition Costs [Member]
Restructuring Cost and Reserve [Line Items]
Facilities relocation and other transition costs, Incurred Cost	$ 2,170	$ 4,890
Facilities relocation costs and other transactions since inception			34,298
Facilities relocation costs and other transactions, Incurred cost, Net of accelerated depreciation expense and share-based compensation expense	2,170	5,531
Restructuring and Related Costs Incurred To Date Net of Accelerated Depreciation Expense and Share-Based Compensation Expense			36,687
Facilities Relocation and Other Transition Costs [Member] | Severance, Retention and Other Payroll Costs [Member]
Restructuring Cost and Reserve [Line Items]
Facilities relocation and other transition costs, Incurred Cost	942	2,999
Facilities relocation costs and other transactions since inception			16,239
Facilities Relocation and Other Transition Costs [Member] | Relocation Costs [Member]
Restructuring Cost and Reserve [Line Items]
Facilities relocation and other transition costs, Incurred Cost	817	576
Facilities relocation costs and other transactions since inception			6,039
Facilities Relocation and Other Transition Costs [Member] | Atlanta Facility Closure Costs [Member]
Restructuring Cost and Reserve [Line Items]
Facilities relocation and other transition costs, Incurred Cost	218	44
Facilities relocation costs and other transactions since inception			4,759
Facilities Relocation and Other Transition Costs [Member] | Consulting and Professional Fees [Member]
Restructuring Cost and Reserve [Line Items]
Facilities relocation and other transition costs, Incurred Cost	107	885
Facilities relocation costs and other transactions since inception			5,035
Facilities Relocation and Other Transition Costs [Member] | Other [Member]
Restructuring Cost and Reserve [Line Items]
Facilities relocation and other transition costs, Incurred Cost	86	386
Facilities relocation costs and other transactions since inception			2,226
Facilities Relocation and Other Transition Costs [Member] | Accelerated Depreciation Expense [Member]
Restructuring Cost and Reserve [Line Items]
Facilities relocation and other transition costs, Incurred Cost	0	641
Facilities relocation costs and other transactions since inception			2,118
Facilities Relocation and Other Transition Costs [Member] | Share Based Compensation Expense [Member]
Restructuring Cost and Reserve [Line Items]
Facilities relocation and other transition costs, Incurred Cost	0	0
Facilities relocation costs and other transactions since inception			271
Fiscal Year 2013 [Member]
Restructuring Cost and Reserve [Line Items]
Facilities relocation costs and other transactions expected to be incurred	4,800
Fiscal Year 2013 [Member] | Facilities Relocation and Other Transition Costs [Member]
Restructuring Cost and Reserve [Line Items]
Facilities relocation costs and other transactions expected to be incurred	36,882
Restructuring And Related Cost, Expected Cost, Net of Accelerated Depreciation Expense and Share-Based Compensation Expense	39,271
Fiscal Year 2013 [Member] | Facilities Relocation and Other Transition Costs [Member] | Severance, Retention and Other Payroll Costs [Member]
Restructuring Cost and Reserve [Line Items]
Facilities relocation costs and other transactions expected to be incurred	17,526
Fiscal Year 2013 [Member] | Facilities Relocation and Other Transition Costs [Member] | Relocation Costs [Member]
Restructuring Cost and Reserve [Line Items]
Facilities relocation costs and other transactions expected to be incurred	7,270
Fiscal Year 2013 [Member] | Facilities Relocation and Other Transition Costs [Member] | Atlanta Facility Closure Costs [Member]
Restructuring Cost and Reserve [Line Items]
Facilities relocation costs and other transactions expected to be incurred	4,759
Fiscal Year 2013 [Member] | Facilities Relocation and Other Transition Costs [Member] | Consulting and Professional Fees [Member]
Restructuring Cost and Reserve [Line Items]
Facilities relocation costs and other transactions expected to be incurred	5,035
Fiscal Year 2013 [Member] | Facilities Relocation and Other Transition Costs [Member] | Other [Member]
Restructuring Cost and Reserve [Line Items]
Facilities relocation costs and other transactions expected to be incurred	2,292
Fiscal Year 2013 [Member] | Facilities Relocation and Other Transition Costs [Member] | Accelerated Depreciation Expense [Member]
Restructuring Cost and Reserve [Line Items]
Facilities relocation costs and other transactions expected to be incurred	2,118
Fiscal Year 2013 [Member] | Facilities Relocation and Other Transition Costs [Member] | Share Based Compensation Expense [Member]
Restructuring Cost and Reserve [Line Items]
Facilities relocation costs and other transactions expected to be incurred	$ 271