Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001564590-18-002882-index-headers.html | 2018-02-22 16:19:52 | |
| 0001564590-18-002882-index.html | 2018-02-22 16:19:52 | |
| 0001564590-18-002882.txt | 2018-02-22 16:19:52 | |
 0001564590-18-002882-xbrl.zip | 162142 | 2018-02-22 16:19:52 |
| FilingSummary.xml | 43526 | 2018-02-22 16:19:52 |
| Financial_Report.xlsx | 78215 | 2018-02-22 16:19:52 |
| R1.htm | 29966 | 2018-02-22 16:19:52 |
| R10.htm | 23713 | 2018-02-22 16:19:52 |
| R11.htm | 113442 | 2018-02-22 16:19:52 |
| R12.htm | 70010 | 2018-02-22 16:19:52 |
| R13.htm | 34029 | 2018-02-22 16:19:52 |
| R14.htm | 175874 | 2018-02-22 16:19:52 |
| R15.htm | 9166 | 2018-02-22 16:19:52 |
| R16.htm | 259020 | 2018-02-22 16:19:52 |
| R17.htm | 125329 | 2018-02-22 16:19:52 |
| R18.htm | 45319 | 2018-02-22 16:19:52 |
| R19.htm | 68615 | 2018-02-22 16:19:52 |
| R2.htm | 80904 | 2018-02-22 16:19:52 |
| R20.htm | 131044 | 2018-02-22 16:19:52 |
| R21.htm | 69123 | 2018-02-22 16:19:52 |
| R22.htm | 52031 | 2018-02-22 16:19:52 |
| R23.htm | 20884 | 2018-02-22 16:19:52 |
| R24.htm | 114217 | 2018-02-22 16:19:52 |
| R25.htm | 69625 | 2018-02-22 16:19:52 |
| R26.htm | 31099 | 2018-02-22 16:19:52 |
| R27.htm | 172462 | 2018-02-22 16:19:52 |
| R28.htm | 259010 | 2018-02-22 16:19:52 |
| R29.htm | 125154 | 2018-02-22 16:19:52 |
| R3.htm | 23239 | 2018-02-22 16:19:52 |
| R30.htm | 42835 | 2018-02-22 16:19:52 |
| R31.htm | 67938 | 2018-02-22 16:19:52 |
| R32.htm | 53247 | 2018-02-22 16:19:52 |
| R33.htm | 23487 | 2018-02-22 16:19:52 |
| R34.htm | 19636 | 2018-02-22 16:19:52 |
| R35.htm | 9693 | 2018-02-22 16:19:52 |
| R36.htm | 19167 | 2018-02-22 16:19:52 |
| R37.htm | 75359 | 2018-02-22 16:19:52 |
| R38.htm | 21836 | 2018-02-22 16:19:52 |
| R39.htm | 10531 | 2018-02-22 16:19:52 |
| R4.htm | 51244 | 2018-02-22 16:19:52 |
| R40.htm | 19483 | 2018-02-22 16:19:52 |
| R41.htm | 7361 | 2018-02-22 16:19:52 |
| R42.htm | 14101 | 2018-02-22 16:19:52 |
| R43.htm | 13526 | 2018-02-22 16:19:52 |
| R44.htm | 5490 | 2018-02-22 16:19:52 |
| R45.htm | 13448 | 2018-02-22 16:19:52 |
| R46.htm | 26397 | 2018-02-22 16:19:52 |
| R47.htm | 4825 | 2018-02-22 16:19:52 |
| R48.htm | 9419 | 2018-02-22 16:19:52 |
| R49.htm | 4229 | 2018-02-22 16:19:52 |
| R5.htm | 53496 | 2018-02-22 16:19:52 |
| R50.htm | 103017 | 2018-02-22 16:19:52 |
| R51.htm | 27968 | 2018-02-22 16:19:52 |
| R52.htm | 10042 | 2018-02-22 16:19:52 |
| R53.htm | 19004 | 2018-02-22 16:19:52 |
| R54.htm | 23155 | 2018-02-22 16:19:52 |
| R55.htm | 23696 | 2018-02-22 16:19:52 |
| R56.htm | 33737 | 2018-02-22 16:19:52 |
| R57.htm | 26969 | 2018-02-22 16:19:52 |
| R58.htm | 22436 | 2018-02-22 16:19:52 |
| R59.htm | 18726 | 2018-02-22 16:19:52 |
| R6.htm | 6411 | 2018-02-22 16:19:52 |
| R60.htm | 13068 | 2018-02-22 16:19:52 |
| R61.htm | 18408 | 2018-02-22 16:19:52 |
| R62.htm | 14460 | 2018-02-22 16:19:52 |
| R63.htm | 40874 | 2018-02-22 16:19:52 |
| R64.htm | 11134 | 2018-02-22 16:19:52 |
| R7.htm | 73964 | 2018-02-22 16:19:52 |
| R8.htm | 89221 | 2018-02-22 16:19:52 |
| R9.htm | 59403 | 2018-02-22 16:19:52 |
| report.css | 2767 | 2018-02-22 16:19:52 |
| saia-10k_20171231.htm | 3257079 | 2018-02-22 16:19:52 |
| saia-20171231.xml | 2471649 | 2018-02-22 16:19:52 |
| saia-20171231.xsd | 59872 | 2018-02-22 16:19:52 |
| saia-20171231_cal.xml | 69707 | 2018-02-22 16:19:52 |
| saia-20171231_def.xml | 177182 | 2018-02-22 16:19:52 |
| saia-20171231_lab.xml | 477138 | 2018-02-22 16:19:52 |
| saia-20171231_pre.xml | 377917 | 2018-02-22 16:19:52 |
| saia-ex211_9.htm | 2316 | 2018-02-22 16:19:52 |
| saia-ex231_8.htm | 3817 | 2018-02-22 16:19:52 |
| saia-ex311_6.htm | 16089 | 2018-02-22 16:19:52 |
| saia-ex312_11.htm | 16118 | 2018-02-22 16:19:52 |
| saia-ex321_10.htm | 7426 | 2018-02-22 16:19:52 |
| saia-ex322_7.htm | 7814 | 2018-02-22 16:19:52 |
| Show.js | 1410 | 2018-02-22 16:19:52 |