Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Detail)				1 Months Ended	4 Months Ended		6 Months Ended		12 Months Ended
	Dec. 14, 2015 partnership	Jul. 24, 2015	Mar. 20, 2015 USD ($)	Apr. 30, 2014 USD ($)	Jan. 03, 2017 USD ($) location restaurant	Dec. 29, 2015 USD ($) location restaurant	Dec. 29, 2015 USD ($) restaurant	Jun. 30, 2015 USD ($)	Jan. 03, 2017 USD ($) Segment renewal restaurant vendor	Dec. 29, 2015 USD ($) partnership restaurant	Dec. 30, 2014 USD ($) shareholder	Mar. 31, 2015 USD ($)
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Percentage of ownership interest in partnerships										1.00%
Number of partnership units | partnership										4
Number of vendors | vendor									1
Lease agreement term (in years)									35 years
Number of underperforming locations | location					12
Deductible per occurrence for general liability									$ 350,000
Percentage of net sales for advertising									4.00%
Number of operating segments | Segment									1
Number of reportable segments | Segment									1
Number of restaurants | restaurant					22				22
Percentage gross sales of restaurants									12.00%
Adjustment to estimated fair value of investment										$ 1,500,000
Outstanding amount of subordinated notes												$ 111,200,000
Entity operated units
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of restaurants | restaurant					310	297	297		310	297
Franchised units
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of restaurants | restaurant					241	247	247		241	247
CALIFORNIA
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of restaurants | restaurant					369				369
CALIFORNIA | Entity operated units
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of restaurants | restaurant					253				253
CALIFORNIA | Franchised units
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of restaurants | restaurant					116				116
Minimum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of lease renewal options | renewal									1
Lease renewal term (in years)									5 years
Insurance coverage deductibles range for claims									$ 250,000
Maximum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of lease renewal options | renewal									4
Lease renewal term (in years)									10 years
Insurance coverage deductibles range for claims									$ 500,000
Capitalized software
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of assets (in years)									3 years
Buildings under capital leases
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of assets (in years)									20 years
Restaurant and other equipment | Minimum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of assets (in years)									3 years
Restaurant and other equipment | Maximum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of assets (in years)									15 years
Successor
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Promotional allowances							$ 5,800,000		$ 13,600,000
Deferred gift card income					$ 1,182,000	$ 2,217,000	2,217,000		1,182,000	$ 2,217,000
Allowance for doubtful accounts					100,000	100,000	100,000		100,000	100,000
Noncurrent portion of advanced reimbursements					1,600,000	2,000,000	2,000,000		1,600,000	2,000,000
Current portion of advanced reimbursements					400,000	400,000	400,000		400,000	400,000
Depreciation and amortization expense							10,100,000		20,600,000
Property and equipment depreciation expense					30,564,000	10,093,000	10,093,000		30,564,000	10,093,000
Carrying value of capitalized software costs					2,000,000	1,700,000	1,700,000		2,000,000	1,700,000
Capitalized software costs							600,000		1,300,000
Capitalized software amortization expense							400,000		900,000
Interest capitalized in connection with construction							25,000		100,000
Carrying value of unfavorable lease liabilities					21,000,000	21,000,000	21,000,000		21,000,000	21,000,000
Lease accumulated amortization					3,900,000	1,300,000	1,300,000		3,900,000	1,300,000
Unfavorable lease liabilities reclassification						$ 2,600,000
Number of underperforming locations | location						12
Amortization credits for unfavorable lease liabilities									$ 2,600,000
Weighted-average amortization period (in years)									8 years 9 months
Advertising expenses							7,600,000		$ 17,200,000
Pre-opening costs							366,000		731,000
Partnership monthly rental income							1,400,000
Date of agreement, to sale properties		Jul. 24, 2015
Number of investments sold | partnership	4
Realized gain on sale of equity method investment							200,000
Proceeds from sale of equity method investment							1,800,000
Equity method investment sold							1,600,000
Proceeds from credit facility							162,556,000		24,000,000
Cash paid in connection with debt refinancing							484,000		0
Gift Card Liability, Current					1,200,000	$ 0	0		1,200,000	0
Successor | Entity operated units
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Accrued advertising					1,000,000	600,000	600,000		1,000,000	600,000
Successor | Franchised units
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Accrued advertising					700,000	400,000	400,000		700,000	400,000
Successor | Buildings under capital leases
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Depreciation and amortization expense							800,000		1,400,000
Property and equipment depreciation expense					2,200,000	800,000	800,000		2,200,000	800,000
Successor | Construction-in-progress
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Capitalized construction costs							500,000		1,300,000
Predecessor [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Promotional allowances								$ 5,400,000			$ 11,000,000
Depreciation and amortization expense								7,100,000			16,000,000
Capitalized software costs								500,000			1,000,000
Capitalized software amortization expense								400,000			700,000
Interest capitalized in connection with construction								40,000			100,000
Amortization credits for unfavorable lease liabilities							1,300,000	300,000			700,000
Advertising expenses								8,700,000			15,200,000
Pre-opening costs								276,000			462,000
Partnership monthly rental income								1,400,000			2,900,000
Outstanding amount of subordinated notes			$ 111,200,000								$ 108,100,000
Number of largest shareholders | shareholder											3
Proceeds from credit facility								10,000,000			$ 0
Interest expenses related to subordinated notes								3,100,000			15,400,000
Cash paid in connection with debt refinancing				$ 500,000				593,000			$ 392,000
Predecessor [Member] | Subordinated debt
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Interest rate of subordinated notes											13.00%
Predecessor [Member] | Buildings under capital leases
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Depreciation and amortization expense								300,000			$ 700,000
Predecessor [Member] | Construction-in-progress
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Capitalized construction costs								$ 500,000			$ 1,000,000
Development and Franchise Fees | Successor | Other Noncurrent Liabilities
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Deferred development fees and deferred franchise fees					1,400,000	1,900,000	1,900,000		1,400,000	1,900,000
Insurance Claims | Successor
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Insurance claim receivable					$ 800,000	$ 300,000	$ 300,000		$ 800,000	$ 300,000
Revolver | DTH 2013 Senior Credit Facility | Predecessor [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Proceeds from credit facility			10,000,000
Term Loan | DTH 2013 Senior Credit Facility | Predecessor [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Proceeds from credit facility			$ 25,100,000