Accounts Receivable [Abstract]

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Amounts due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer) for goods or services (including trade receivables) that have been delivered or sold in the normal course of business.

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A valuation allowance relating to a written agreement to receive money (at a specified future date(s) within one year from the reporting date (or the normal operating cycle, whichever is longer), consisting of principal as well as any accrued interest) for the portion that is expected to be uncollectible.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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- Definition

Carrying amounts due as of the balance sheet date of the sum of amounts receivable other than from customers.

+ References

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- Definition

An amount representing an agreement for an unconditional promise by the maker to pay the Entity (holder) a definite sum of money at a future date(s) within one year of the balance sheet date or the normal operating cycle, whichever is longer. Such amount may include accrued interest receivable in accordance with the terms of the debt. The debt also may contain provisions including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale.

+ References

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An amount representing an agreement for an unconditional promise by the maker to pay the Company (holder) a definite sum of money within one year from the balance sheet date (or the normal operating cycle, whichever is longer), net of any write-downs taken for collection uncertainty on the part of the holder. Such amount may include accrued interest receivable in accordance with the terms of the debt. The debt also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale.

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Accounts Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
Accounts Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 27, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounts Receivable [Abstract]
Trade receivables	$ 103,202		$ 96,177
Other receivables	10,253		6,830
Receivables, current	113,455		103,007
Allowance for doubtful accounts	(867)		(514)
Accounts receivable, net	$ 112,588		$ 102,493
Ford [Member] \| Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage		44.00%	44.00%	45.00%
General Motors [Member] \| Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage		24.00%	24.00%	24.00%
Toyota [Member] \| Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage		14.00%	12.00%	12.00%
Fiat Chrysler Automobiles [Member] \| Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage		8.00%	10.00%	10.00%
Ford, GM, Toyota, Fiat Chrysler Companies [Member] [Member] \| Credit Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	90.00%		92.00%