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Restaurant Closure and Other Related Charges - Restaurant Closure Liability Activity (Details) - Successor $ in Thousands	4 Months Ended	6 Months Ended		12 Months Ended
	Jan. 03, 2017 USD ($) location	Dec. 29, 2015 USD ($)	Jun. 30, 2015 USD ($)	Jan. 01, 2019 USD ($)	Jan. 02, 2018 USD ($)	Jan. 03, 2017 USD ($)
Restructuring Reserve [Roll Forward]
Closure liability at beginning of period				$ 2,800
Charges for accretion in current period				449	$ 379	$ 179
Closure liability at end of period				2,400	2,800
Number of underperforming locations \| location	12
Facility Closing [Member]
Restructuring Reserve [Roll Forward]
Closure liability at beginning of period		$ 1,365		1,213	1,023
Adjustments to estimate based on current activity		22	$ 439	(513)
Restructuring Reserve, Period Increase (Decrease)		0		0	46
Charges for accretion in current period		97	80	54
Cash payments		(317)	(177)	(435)
Closure liability at end of period	$ 1,023		1,365	319	1,213	1,023
12 Underperforming Restaurants
Restructuring Cost and Reserve [Line Items]
Restructuring cost incurred				700
Restructuring Reserve [Roll Forward]
Closure liability at beginning of period		3,800		1,611	1,773
Adjustments to estimate based on current activity				747	144
Charges for accretion in current period		133		61	70
Cash payments		(1,607)		(327)	(376)
Reclassification of lease related liabilities		(553)
Closure liability at end of period	$ 1,773		3,800	2,092	1,611	1,773
Number of underperforming locations \| location	12
12 Underperforming Restaurants \| Contract Termination [Member]
Restructuring Reserve [Roll Forward]
Closure liability at beginning of period		3,637		1,611	1,773
Adjustments to estimate based on current activity				747	144
Charges for accretion in current period		133		61	70
Cash payments		(1,444)		(327)	(376)
Reclassification of lease related liabilities		(553)
Closure liability at end of period	$ 1,773		3,637	2,092	1,611	1,773
12 Underperforming Restaurants \| Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Closure liability at beginning of period		163		0	0
Adjustments to estimate based on current activity				0	0
Charges for accretion in current period		0		0	0
Cash payments		(163)		0	0
Reclassification of lease related liabilities		$ 0
Closure liability at end of period	$ 0		$ 163	$ 0	$ 0	$ 0