Accounting Standards Issued and Not Yet Implemented	3 Months Ended
Mar. 25, 2016
Accounting Changes and Error Corrections [Abstract]
Accounting Standards Issued and Not Yet Implemented	4. Accounting Standards Issued and Not Yet Implemented In February 2016, the FASB issued ASU 2016-02, Leases, which updates the existing guidance on accounting for leases and requires new qualitative and quantitative disclosures about the Company’s leasing activities. The new standard requires the Company to recognize lease assets and lease liabilities on the balance sheet for all leases under which the Company is the lessee, including those classified as operating leases under previous accounting guidance. The new standard allows the Company to make an accounting policy election not to recognize on the balance sheet lease assets and liabilities for leases with a term of 12 months or less. The accounting applied by a lessor is largely unchanged from previous guidance. The new standard, as amended, will be effective for the Company for interim and annual reporting periods beginning on January 1, 2019, with early adoption permitted. In transition, lessees and lessors are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The modified retrospective approach includes a number of optional practical expedients that the Company may elect to apply. The Company is currently evaluating the expected impact of the adoption of this standard on its consolidated financial statements and related disclosures. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers, which will replace numerous requirements in U.S. GAAP, including industry-specific requirements, provide companies with a single revenue recognition model for recognizing revenue from contracts with customers and significantly expand the disclosure requirements for revenue arrangements. The new standard, as amended, will be effective for the Company for interim and annual reporting periods beginning on January 1, 2018, with early application permitted beginning on January 1, 2017. The two permitted transition methods under the new standard are the full retrospective method, in which case the standard would be applied to each prior reporting period presented, or the modified retrospective method, in which case the cumulative effect of applying the standard would be recognized at the date of initial application with disclosure of results under the new and old standards for the first year of adoption. Under the new standard, an entity recognizes revenue when or as it satisfies a performance obligation by transferring a good or service to the customer, either at a point in time or over time. The Company expects to recognize revenue over time on most of its contracts that are covered by contract accounting standards and on its contracts to perform services for the U.S. Government that are not covered by contract accounting standards, which is similar to the POC cost-to-cost method currently used on certain of these contracts. The Company is currently evaluating the expected impact of the adoption of this standard on its consolidated financial statements and related disclosures and the transition alternatives available. Other accounting standard updates effective for interim and annual periods beginning after December 15, 2016 are not expected to have an impact on the Company’s financial position, results of operations or cash flows.

4. Accounting Standards Issued and Not Yet Implemented

In February 2016, the FASB issued ASU 2016-02, Leases, which updates the existing guidance on accounting for leases and requires new qualitative and quantitative disclosures about the Company’s leasing activities. The new standard requires the Company to recognize lease assets and lease liabilities on the balance sheet for all leases under which the Company is the lessee, including those classified as operating leases under previous accounting guidance. The new standard allows the Company to make an accounting policy election not to recognize on the balance sheet lease assets and liabilities for leases with a term of 12 months or less. The accounting applied by a lessor is largely unchanged from previous guidance. The new standard, as amended, will be effective for the Company for interim and annual reporting periods beginning on January 1, 2019, with early adoption permitted. In transition, lessees and lessors are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The modified retrospective approach includes a number of optional practical expedients that the Company may elect to apply. The Company is currently evaluating the expected impact of the adoption of this standard on its consolidated financial statements and related disclosures.

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers, which will replace numerous requirements in U.S. GAAP, including industry-specific requirements, provide companies with a single revenue recognition model for recognizing revenue from contracts with customers and significantly expand the disclosure requirements for revenue arrangements. The new standard, as amended, will be effective for the Company for interim and annual reporting periods beginning on January 1, 2018, with early application permitted beginning on January 1, 2017. The two permitted transition methods under the new standard are the full retrospective method, in which case the standard would be applied to each prior reporting period presented, or the modified retrospective method, in which case the cumulative effect of applying the standard would be recognized at the date of initial application with disclosure of results under the new and old standards for the first year of adoption. Under the new standard, an entity recognizes revenue when or as it satisfies a performance obligation by transferring a good or service to the customer, either at a point in time or over time. The Company expects to recognize revenue over time on most of its contracts that are covered by contract accounting standards and on its contracts to perform services for the U.S. Government that are not covered by contract accounting standards, which is similar to the POC cost-to-cost method currently used on certain of these contracts. The Company is currently evaluating the expected impact of the adoption of this standard on its consolidated financial statements and related disclosures and the transition alternatives available.

Other accounting standard updates effective for interim and annual periods beginning after December 15, 2016 are not expected to have an impact on the Company’s financial position, results of operations or cash flows.