Slicers (applies to each fact value in each table cell)

Reporting Entity [Axis]

0001589526 (http://www.sec.gov/CIK)

Compensation and Retirement Disclosure [Abstract]	Period [Axis]
	2015-10-04 - 2016-10-01
Compensation and Retirement Disclosure [Abstract]
Schedule of Changes in Projected Benefit Obligations	The reconciliation of the beginning and ending balances of the PBO for the Defined Benefit Plan for the fiscal years indicated is presented in the following table:   Benefit Obligation (in thousands of dollars) 2016   2015 Projected benefit obligation balance, beginning of year $ 142,798   $ 142,555 Interest cost 5,643   5,707 Assumption changes (1) 14,402   1,246 Actuarial gain 440   394 Benefits paid (6,253 )   (7,104 ) Projected benefit obligations balance, end of year $ 157,030   $ 142,798 (1) The assumption changes referenced in the table above result from (i) changes in the utilized discount rate to value Blue Bird’s future obligations and (ii) updates to the mortality table projections used in the calculation of the benefit obligations.
Schedule of Changes in Fair Value of Plan Assets	The summary and reconciliation of the beginning and ending balances of the fair value of the plan assets are as follows:   Plan Assets (in thousands of dollars) 2016   2015 Fair value of plan assets, beginning of year $ 96,371   $ 101,674 Actual return on plan assets 6,337   (3,039 ) Employer contribution 5,305   5,516 Expenses (1,098 )   (676 ) Benefits paid (6,253 )   (7,104 ) Fair value of plan assets, end of year $ 100,662   $ 96,371
Schedule of Net Funded Status	The net pension liability is reflected in long-term liabilities on the Consolidated Balance Sheets.   Funded Status (in thousands of dollars) October 1, 2016   October 3, 2015 Benefit obligation $ 157,030   $ 142,798 Fair value of plan assets 100,662   96,371 Funded status (56,368 )   (46,427 ) Net pension liability recognized $ (56,368 )   $ (46,427 )
Schedule of Allocation of Plan Assets	The following table sets forth, by level within the fair value hierarchy, a summary of the Defined Benefit Plan’s investments measured at fair value: (in thousands of dollars)   Level 1   Level 2   Level 3   Total October 1, 2016                 Assets:                 Equity securities   $ —   $ 58,904   $ —   $ 58,904 Debt securities   —   41,758   —   41,758 Total assets at fair value   $ —   $ 100,662   $ —   $ 100,662                   October 3, 2015                 Assets:                 Equity securities   $ —   $ 73,336   $ —   $ 73,336 Debt securities   —   23,035   —   23,035 Total assets at fair value   $ —   $ 96,371   $ —   $ 96,371 The Defined Benefit Plan asset allocations at the dates indicated, the measurement date, are as follows:    October 1, 2016   October 3, 2015 Equity securities 59 %   76 % Debt securities 41 %   24 %   100 %   100 %
Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss)	The following table represents net periodic benefit cost and changes in plan assets and benefit obligations recognized in other comprehensive income, before tax effect, for the fiscal years presented: (in thousands of dollars) 2016   2015   2014 Interest cost $ 5,643   $ 5,707   $ 6,084 Expected return on plan assets (6,112 )   (6,443 )   (6,524 ) Amortization of net loss 4,787   3,567   2,804 Net periodic benefit cost $ 4,318   $ 2,831   $ 2,364 Net loss 15,716   11,797   9,261 Amortization of net loss (4,787 )   (3,567 )   (2,804 ) Total recognized in other comprehensive income $ 10,929   $ 8,230   $ 6,457 Total recognized in net periodic pension benefit cost and other comprehensive income $ 15,247   $ 11,061   $ 8,821
Schedule of Assumptions Used	Weighted-average assumptions used to determine net periodic benefit cost:   October 1, 2016   October 3, 2015 Discount rate   4.05 %   4.10 % Expected long-term return on plan assets   6.37 %   6.37 % Rate of compensation increase   N/A   N/A Weighted-average assumptions used to determine benefit obligations:   October 1, 2016   October 3, 2015 Discount rate   3.30 %   4.05 % Rate of compensation increase   N/A   N/A
Schedule of Expected Benefit Payments	The following benefit payments are expected to be paid to the Company’s pension plan participants in the fiscal years indicated: (in thousands of dollars) Expected Payments 2017 $ 7,209 2018 7,419 2019 7,572 2020 7,675 2021 7,875 2022 - 2026 42,362 Total expected future benefit payments $ 80,112