Form 10-Q - Quarterly report [Sections 13 or 15(d)]:
SEC Accession No. 0000860413-25-000165
Filing Date
2025-11-06
Accepted
2025-11-06 15:22:06
Documents
91
Period of Report
2025-09-30

Document Format Files

Seq Description Document Type Size
1 10-Q fibk-20250930.htm   iXBRL 10-Q 3811556
2 EX-31.1 fibk-20250930xex311.htm EX-31.1 10060
3 EX-31.2 fibk-20250930xex312.htm EX-31.2 10228
4 EX-32 fibk-20250930xex32.htm EX-32 4037
  Complete submission text file 0000860413-25-000165.txt   19304510

Data Files

Seq Description Document Type Size
5 XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT fibk-20250930.xsd EX-101.SCH 74706
6 XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT fibk-20250930_cal.xml EX-101.CAL 129974
7 XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT fibk-20250930_def.xml EX-101.DEF 655095
8 XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT fibk-20250930_lab.xml EX-101.LAB 908489
9 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT fibk-20250930_pre.xml EX-101.PRE 848320
93 EXTRACTED XBRL INSTANCE DOCUMENT fibk-20250930_htm.xml XML 4581925
Mailing Address 401 NO 31ST STREET BILLINGS MT 59101
Business Address 401 NO 31ST STREET BILLINGS MT 59101 4062555311
FIRST INTERSTATE BANCSYSTEM INC (Filer) CIK: 0000860413 (see all company filings)

EIN.: 810331430 | State of Incorp.: DE | Fiscal Year End: 1231
Type: 10-Q | Act: 34 | File No.: 001-34653 | Film No.: 251457782
SIC: 6022 State Commercial Banks
(CF Office: 02 Finance)