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Fair Value - Redeemable Noncontrolling Interest (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 27, 2015	Jun. 28, 2014
Fair Value Disclosures [Abstract]
Percentage of voting interests acquired	75.00%
Remaining ownership percentage available	25.00%
Total gains or losses (realized/unrealized):
Discount rate	19.00%
Level 3 | Redeemable Noncontrolling Interest
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 28,419	$ 20,581
Additions	0	0
Total gains or losses (realized/unrealized):
Net income attributable to noncontrolling interest	364	372
Foreign currency translation	112	(462)
Change in fair value, included in additional paid-in capital	1,081	2,992
Ending balance	$ 29,976	$ 23,483

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Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Change in Fair Value Included in Additional Paid-In Capital

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Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

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