Leases - Schedule of Minimum Future Rental Income Under Non-Cancelable Operating Lease (Detail) $ in Thousands	Dec. 28, 2016 USD ($)
Property Subject to or Available for Operating Lease [Line Items]
Operating lease, minimum sublease rental	$ 4,791
Company Operated Properties [Member]
Property Subject to or Available for Operating Lease [Line Items]
Operating lease, minimum sublease rental	1,550
December 27, 2017 [Member]
Property Subject to or Available for Operating Lease [Line Items]
Operating lease, minimum sublease rental	1,091
December 27, 2017 [Member] | Company Operated Properties [Member]
Property Subject to or Available for Operating Lease [Line Items]
Operating lease, minimum sublease rental	274
December 26, 2018 [Member]
Property Subject to or Available for Operating Lease [Line Items]
Operating lease, minimum sublease rental	932
December 26, 2018 [Member] | Company Operated Properties [Member]
Property Subject to or Available for Operating Lease [Line Items]
Operating lease, minimum sublease rental	274
December 25, 2019 [Member]
Property Subject to or Available for Operating Lease [Line Items]
Operating lease, minimum sublease rental	728
December 25, 2019 [Member] | Company Operated Properties [Member]
Property Subject to or Available for Operating Lease [Line Items]
Operating lease, minimum sublease rental	184
December 30, 2020 [Member]
Property Subject to or Available for Operating Lease [Line Items]
Operating lease, minimum sublease rental	389
December 30, 2020 [Member] | Company Operated Properties [Member]
Property Subject to or Available for Operating Lease [Line Items]
Operating lease, minimum sublease rental	188
December 29, 2021 [Member]
Property Subject to or Available for Operating Lease [Line Items]
Operating lease, minimum sublease rental	365
December 29, 2021 [Member] | Company Operated Properties [Member]
Property Subject to or Available for Operating Lease [Line Items]
Operating lease, minimum sublease rental	146
Thereafter [Member]
Property Subject to or Available for Operating Lease [Line Items]
Operating lease, minimum sublease rental	1,286
Thereafter [Member] | Company Operated Properties [Member]
Property Subject to or Available for Operating Lease [Line Items]
Operating lease, minimum sublease rental	$ 484