SCHEDULE I - Parent Company Information - Condensed Statements of Cash Flows (Details) - USD ($)
$ in Thousands |
3 Months Ended |
9 Months Ended |
12 Months Ended |
Sep. 28, 2017 |
Sep. 29, 2016 |
Sep. 28, 2017 |
Sep. 29, 2016 |
Dec. 29, 2016 |
Dec. 31, 2015 |
Dec. 25, 2014 |
| Operating activities |
|
|
|
|
|
|
|
| Net income |
$ 23,255
|
$ 14,219
|
$ 54,812
|
$ 26,332
|
$ 43,039
|
$ 26,807
|
$ 15,098
|
| Adjustments to reconcile net income to net cash provided by operating activities: |
|
|
|
|
|
|
|
| Net cash provided by operating activities |
|
|
|
|
89,456
|
20,380
|
43,594
|
| Investing activities |
|
|
|
|
|
|
|
| Net cash used in investing activities |
|
|
|
|
(74,648)
|
(45,021)
|
(39,069)
|
| Financing activities |
|
|
|
|
|
|
|
| Proceeds from exercise of stock options |
|
|
4,327
|
338
|
284
|
40
|
658
|
| Cash dividends |
|
|
|
|
(225,000)
|
0
|
0
|
| Net cash used in financing activities |
|
|
|
|
(14,675)
|
24,680
|
(4,421)
|
| Net (decrease) increase in cash and cash equivalents |
|
|
116
|
31
|
133
|
39
|
104
|
| Cash and cash equivalents, beginning of the period |
|
|
451
|
318
|
318
|
279
|
175
|
| Cash and cash equivalents, end of the period |
$ 567
|
$ 349
|
567
|
349
|
451
|
318
|
279
|
| Parent Company [Member] |
|
|
|
|
|
|
|
| Operating activities |
|
|
|
|
|
|
|
| Net income |
|
|
|
|
43,039
|
26,807
|
15,098
|
| Adjustments to reconcile net income to net cash provided by operating activities: |
|
|
|
|
|
|
|
| Net income from subsidiaries |
|
|
|
|
(43,039)
|
(26,807)
|
(15,098)
|
| Net cash provided by operating activities |
|
|
|
|
0
|
0
|
0
|
| Investing activities |
|
|
|
|
|
|
|
| Investment in subsidiary |
|
|
|
|
(284)
|
(40)
|
(954)
|
| Distribution from subsidiary |
|
|
|
|
225,000
|
0
|
0
|
| Net cash used in investing activities |
|
|
|
|
224,716
|
(40)
|
(954)
|
| Financing activities |
|
|
|
|
|
|
|
| Proceeds from exercise of stock options |
|
|
|
|
284
|
40
|
954
|
| Cash dividends |
|
|
|
|
(225,000)
|
0
|
0
|
| Net cash used in financing activities |
|
|
|
|
(224,716)
|
40
|
954
|
| Net (decrease) increase in cash and cash equivalents |
|
|
|
|
0
|
0
|
0
|
| Cash and cash equivalents, beginning of the period |
|
|
$ 0
|
$ 0
|
0
|
0
|
0
|
| Cash and cash equivalents, end of the period |
|
|
|
|
$ 0
|
$ 0
|
$ 0
|