Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000887343-25-000233-index-headers.html | 2025-08-06 17:15:18 | |
| 0000887343-25-000233-index.html | 2025-08-06 17:15:18 | |
| 0000887343-25-000233.txt | 2025-08-06 17:15:18 | |
 0000887343-25-000233-xbrl.zip | 441046 | 2025-08-06 17:15:18 |
| colb-20250630.htm | 4912692 | 2025-08-06 17:15:18 |
| colb-20250630.xsd | 57247 | 2025-08-06 17:15:18 |
| colb-20250630xex311.htm | 7964 | 2025-08-06 17:15:18 |
| colb-20250630xex312.htm | 8090 | 2025-08-06 17:15:18 |
| colb-20250630xex313.htm | 8072 | 2025-08-06 17:15:18 |
| colb-20250630xex32.htm | 7725 | 2025-08-06 17:15:18 |
| colb-20250630xex32arbylaws.htm | 200313 | 2025-08-06 17:15:18 |
| colb-20250630_cal.xml | 135728 | 2025-08-06 17:15:18 |
| colb-20250630_def.xml | 432212 | 2025-08-06 17:15:18 |
| colb-20250630_htm.xml | 6301562 | 2025-08-06 17:15:18 |
| colb-20250630_lab.xml | 875201 | 2025-08-06 17:15:18 |
| colb-20250630_pre.xml | 670123 | 2025-08-06 17:15:18 |
| FilingSummary.xml | 46353 | 2025-08-06 17:15:18 |
| MetaLinks.json | 1111623 | 2025-08-06 17:15:18 |
| R1.htm | 51516 | 2025-08-06 17:15:18 |
| R10.htm | 110862 | 2025-08-06 17:15:18 |
| R11.htm | 24596 | 2025-08-06 17:15:18 |
| R12.htm | 1635559 | 2025-08-06 17:15:18 |
| R13.htm | 18286 | 2025-08-06 17:15:18 |
| R14.htm | 11013 | 2025-08-06 17:15:18 |
| R15.htm | 32811 | 2025-08-06 17:15:18 |
| R16.htm | 78170 | 2025-08-06 17:15:18 |
| R17.htm | 32428 | 2025-08-06 17:15:18 |
| R18.htm | 306283 | 2025-08-06 17:15:18 |
| R19.htm | 12926 | 2025-08-06 17:15:18 |
| R2.htm | 123737 | 2025-08-06 17:15:18 |
| R20.htm | 13794 | 2025-08-06 17:15:18 |
| R21.htm | 6140 | 2025-08-06 17:15:18 |
| R22.htm | 15336 | 2025-08-06 17:15:18 |
| R23.htm | 8465 | 2025-08-06 17:15:18 |
| R24.htm | 18286 | 2025-08-06 17:15:18 |
| R25.htm | 111641 | 2025-08-06 17:15:18 |
| R26.htm | 21823 | 2025-08-06 17:15:18 |
| R27.htm | 1637904 | 2025-08-06 17:15:18 |
| R28.htm | 19282 | 2025-08-06 17:15:18 |
| R29.htm | 12223 | 2025-08-06 17:15:18 |
| R3.htm | 29864 | 2025-08-06 17:15:18 |
| R30.htm | 76815 | 2025-08-06 17:15:18 |
| R31.htm | 34102 | 2025-08-06 17:15:18 |
| R32.htm | 300042 | 2025-08-06 17:15:18 |
| R33.htm | 36308 | 2025-08-06 17:15:18 |
| R34.htm | 11461 | 2025-08-06 17:15:18 |
| R35.htm | 35482 | 2025-08-06 17:15:18 |
| R36.htm | 58216 | 2025-08-06 17:15:18 |
| R37.htm | 36426 | 2025-08-06 17:15:18 |
| R38.htm | 34380 | 2025-08-06 17:15:18 |
| R39.htm | 16013 | 2025-08-06 17:15:18 |
| R4.htm | 138958 | 2025-08-06 17:15:18 |
| R40.htm | 13577 | 2025-08-06 17:15:18 |
| R41.htm | 56514 | 2025-08-06 17:15:18 |
| R42.htm | 123611 | 2025-08-06 17:15:18 |
| R43.htm | 67574 | 2025-08-06 17:15:18 |
| R44.htm | 204197 | 2025-08-06 17:15:18 |
| R45.htm | 511437 | 2025-08-06 17:15:18 |
| R46.htm | 14275 | 2025-08-06 17:15:18 |
| R47.htm | 10410 | 2025-08-06 17:15:18 |
| R48.htm | 19288 | 2025-08-06 17:15:18 |
| R49.htm | 10519 | 2025-08-06 17:15:18 |
| R5.htm | 60177 | 2025-08-06 17:15:18 |
| R50.htm | 16437 | 2025-08-06 17:15:18 |
| R51.htm | 41700 | 2025-08-06 17:15:18 |
| R52.htm | 34229 | 2025-08-06 17:15:18 |
| R53.htm | 49449 | 2025-08-06 17:15:18 |
| R54.htm | 22149 | 2025-08-06 17:15:18 |
| R55.htm | 57422 | 2025-08-06 17:15:18 |
| R56.htm | 39300 | 2025-08-06 17:15:18 |
| R57.htm | 5180 | 2025-08-06 17:15:18 |
| R58.htm | 80379 | 2025-08-06 17:15:18 |
| R59.htm | 121255 | 2025-08-06 17:15:18 |
| R6.htm | 98527 | 2025-08-06 17:15:18 |
| R60.htm | 18413 | 2025-08-06 17:15:18 |
| R61.htm | 73846 | 2025-08-06 17:15:18 |
| R62.htm | 61456 | 2025-08-06 17:15:18 |
| R63.htm | 19514 | 2025-08-06 17:15:18 |
| R64.htm | 8489 | 2025-08-06 17:15:18 |
| R65.htm | 14461 | 2025-08-06 17:15:18 |
| R66.htm | 21110 | 2025-08-06 17:15:18 |
| R67.htm | 4833 | 2025-08-06 17:15:18 |
| R68.htm | 7879 | 2025-08-06 17:15:18 |
| R7.htm | 4975 | 2025-08-06 17:15:18 |
| R8.htm | 121144 | 2025-08-06 17:15:18 |
| R9.htm | 17101 | 2025-08-06 17:15:18 |
| report.css | 2767 | 2025-08-06 17:15:18 |
| Show.js | 1085 | 2025-08-06 17:15:18 |