XML 38 R27.htm IDEA: XBRL DOCUMENT
v3.23.3

INVESTMENT SECURITIES (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2023
INVESTMENT SECURITIES |
Schedule of amortized cost and fair values of securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | September 30, 2023
​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair
​ |  | Cost |  | Gains |  | Losses |  | Value
​ |  | (In Thousands)
AVAILABLE-FOR-SALE SECURITIES: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Agency mortgage-backed securities |  | $ | 314,632 |  | $ | — |  | $ | 54,143 |  | $ | 260,489
Agency collateralized mortgage obligations | ​ | ​ | 86,687 | ​ | ​ | — | ​ | ​ | 13,553 | ​ | ​ | 73,134
States and political subdivisions | ​ | ​ | 59,273 | ​ | ​ | 10 | ​ | ​ | 6,893 | ​ | ​ | 52,390
Small Business Administration securities | ​ | ​ | 71,628 | ​ | ​ | — | ​ | ​ | 9,693 | ​ | ​ | 61,935
​ |  | $ | 532,220 |  | $ | 10 |  | $ | 84,282 |  | $ | 447,948
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, 2023
​ | ​ | ​ | ​ | ​ | ​ | Amortized | ​ | Gross | ​ | Gross | ​ | ​
​ | ​ | Amortized | ​ | Fair Value | ​ | Carrying | ​ | Unrealized | ​ | Unrealized | ​ | Fair
​ |  | Cost |  | Adjustment |  | Value |  | Gains |  | Losses |  | Value
​ | ​ | (In Thousands)
HELD-TO-MATURITY SECURITIES: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Agency mortgage-backed securities | ​ | $ | 72,927 | ​ | $ | 2,581 | ​ | $ | 75,508 | ​ | $ | — | ​ | $ | 12,340 | ​ | $ | 63,168
Agency collateralized mortgage obligations | ​ |  | 117,593 | ​ |  | (2,583) | ​ |  | 115,010 | ​ |  | — | ​ |  | 17,195 | ​ |  | 97,815
States and political subdivisions | ​ |  | 6,200 | ​ |  | (2) | ​ |  | 6,198 | ​ |  | — | ​ |  | 1,091 | ​ |  | 5,107
​ | ​ | $ | 196,720 | ​ | $ | (4) | ​ | $ | 196,716 | ​ | $ | — | ​ | $ | 30,626 | ​ | $ | 166,090
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, 2022
​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair
​ |  | Cost |  | Gains |  | Losses |  | Value
​ |  | (In Thousands)
AVAILABLE-FOR-SALE SECURITIES: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Agency mortgage-backed securities |  | $ | 327,266 |  | $ | — |  | $ | 40,784 |  | $ | 286,482
Agency collateralized mortgage obligations | ​ | ​ | 90,205 | ​ | ​ | — | ​ | ​ | 11,731 | ​ | ​ | 78,474
States and political subdivisions securities | ​ | ​ | 60,667 | ​ | ​ | 119 | ​ | ​ | 3,291 | ​ | ​ | 57,495
Small Business Administration securities | ​ | ​ | 75,076 | ​ | ​ | — | ​ | ​ | 6,935 | ​ | ​ | 68,141
​ |  | $ | 553,214 |  | $ | 119 |  | $ | 62,741 |  | $ | 490,592
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, 2022
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Amortized | ​ | Gross | ​ | Gross | ​ | ​ | ​
​ | ​ | Amortized | ​ | Fair Value | ​ | Carrying | ​ | Unrealized | ​ | Unrealized | ​ | Fair
​ |  | Cost |  | Adjustment |  | Value |  | Gains |  | Losses |  | Value
​ | ​ | (In Thousands)
HELD-TO-MATURITY SECURITIES: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Agency mortgage-backed securities | ​ | $ | 73,891 | ​ | $ | 3,015 | ​ | $ | 76,906 | ​ | $ | — | ​ | $ | 9,820 | ​ | $ | 67,086
Agency collateralized mortgage obligations | ​ |  | 122,247 | ​ |  | (2,885) | ​ |  | 119,362 | ​ |  | — | ​ |  | 14,129 | ​ |  | 105,233
States and political subdivisions | ​ |  | 6,239 | ​ |  | (12) | ​ |  | 6,227 | ​ |  | — | ​ |  | 781 | ​ |  | 5,446
​ | ​ | $ | 202,377 | ​ | $ | 118 | ​ | $ | 202,495 | ​ | $ | — | ​ | $ | 24,730 | ​ | $ | 177,765
Schedule of amortized cost and fair value of available-for-sale and held-to-maturity securities by contractual maturity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Available-for-Sale | ​ | Held-to-Maturity
​ | ​ | Amortized | ​ | Fair | ​ | Amortized | ​ | Fair
​ |  | Cost |  | Value |  | Carrying Value |  | Value
​ | ​ | (In Thousands)
One year or less | ​ | $ | — | ​ | $ | — | ​ | $ | — |  | $ | —
After one through two years | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
After two through three years | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
After three through four years | ​ | ​ | 245 | ​ | ​ | 245 | ​ | ​ | — | ​ | ​ | —
After four through five years | ​ | ​ | 944 | ​ | ​ | 929 | ​ | ​ | — | ​ | ​ | —
After five through fifteen years | ​ | ​ | 9,715 | ​ | ​ | 9,087 | ​ | ​ | 3,249 | ​ | ​ | 2,699
After fifteen years | ​ | ​ | 48,369 | ​ | ​ | 42,129 | ​ | ​ | 2,949 | ​ | ​ | 2,408
Securities not due on a single maturity date | ​ | ​ | 472,947 | ​ | ​ | 395,558 | ​ | ​ | 190,518 | ​ | ​ | 160,983
​ | ​ | $ | 532,220 | ​ | $ | 447,948 | ​ | $ | 196,716 |  | $ | 166,090
Schedule of fair value and unrealized loss for available-for-sale securities and held-to-maturity securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, 2023
​ | ​ | Less than 12 Months | ​ | 12 Months or More | ​ | Total
​ | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized
Description of Securities |  | Value |  | Losses |  | Value |  | Losses |  | Value |  | Losses
​ |  | (In Thousands)
AVAILABLE-FOR-SALE SECURITIES: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Agency mortgage-backed securities |  | $ | 1 | ​ | $ | — | ​ | $ | 260,488 | ​ | $ | (54,143) | ​ | $ | 260,489 | ​ | $ | (54,143)
Agency collateralized mortgage obligations | ​ | ​ | 8,236 | ​ | ​ | (1,061) | ​ | ​ | 64,898 | ​ | ​ | (12,492) | ​ | ​ | 73,134 | ​ | ​ | (13,553)
States and political subdivisions securities | ​ | ​ | 14,242 | ​ | ​ | (1,387) | ​ | ​ | 36,902 | ​ | ​ | (5,506) | ​ | ​ | 51,144 | ​ | ​ | (6,893)
Small Business Administration securities | ​ | ​ | 7,622 | ​ | ​ | (466) | ​ | ​ | 54,313 | ​ | ​ | (9,227) | ​ | ​ | 61,935 | ​ | ​ | (9,693)
​ |  | $ | 30,101 | ​ | $ | (2,914) | ​ | $ | 416,601 | ​ | $ | (81,368) | ​ | $ | 446,702 | ​ | $ | (84,282)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
HELD-TO-MATURITY SECURITIES: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Agency mortgage-backed securities | ​ | $ | — | ​ | $ | — | ​ | $ | 63,168 | ​ | $ | (12,340) | ​ | $ | 63,168 | ​ | $ | (12,340)
Agency collateralized mortgage obligations | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 97,815 | ​ | ​ | (17,195) | ​ | ​ | 97,815 | ​ | ​ | (17,195)
States and political subdivisions securities | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 5,107 | ​ | ​ | (1,091) | ​ | ​ | 5,107 | ​ | ​ | (1,091)
​ | ​ | $ | — | ​ | $ | — | ​ | $ | 166,090 | ​ | $ | (30,626) | ​ | $ | 166,090 | ​ | $ | (30,626)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, 2022
​ | ​ | Less than 12 Months | ​ | 12 Months or More | ​ | Total
​ | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized
Description of Securities |  | Value |  | Losses |  | Value |  | Losses |  | Value |  | Losses
​ |  | (In Thousands)
AVAILABLE-FOR-SALE SECURITIES: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Agency mortgage-backed securities |  | $ | 221,562 |  | $ | (27,597) |  | $ | 64,918 |  | $ | (13,187) |  | $ | 286,480 |  | $ | (40,784)
Agency collateralized mortgage obligations | ​ | ​ | 28,537 | ​ | ​ | (3,262) | ​ | ​ | 40,642 | ​ | ​ | (8,469) | ​ | ​ | 69,179 | ​ | ​ | (11,731)
States and political subdivisions securities | ​ | ​ | 60,473 | ​ | ​ | (5,224) | ​ | ​ | 7,667 | ​ | ​ | (1,711) | ​ | ​ | 68,140 | ​ | ​ | (6,935)
Small Business Administration securities | ​ | ​ | 44,455 | ​ | ​ | (2,913) | ​ | ​ | 3,753 | ​ | ​ | (378) | ​ | ​ | 48,208 | ​ | ​ | (3,291)
​ |  | $ | 355,027 | ​ | $ | (38,996) |  | $ | 116,980 | ​ | $ | (23,745) |  | $ | 472,007 | ​ | $ | (62,741)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
HELD-TO-MATURITY SECURITIES: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Agency mortgage-backed securities | ​ | $ | 59,218 | ​ | $ | (7,766) | ​ | $ | 7,868 | ​ | $ | (2,054) | ​ | $ | 67,086 | ​ | $ | (9,820)
Agency collateralized mortgage obligations | ​ | ​ | 61,055 | ​ | ​ | (6,411) | ​ | ​ | 44,178 | ​ | ​ | (7,718) | ​ | ​ | 105,233 | ​ | ​ | (14,129)
States and political subdivisions securities | ​ | ​ | 900 | ​ | ​ | (101) | ​ | ​ | 4,546 | ​ | ​ | (680) | ​ | ​ | 5,446 | ​ | ​ | (781)
​ | ​ | $ | 121,173 | ​ | $ | (14,278) | ​ | $ | 56,592 | ​ | $ | (10,452) | ​ | $ | 177,765 | ​ | $ | (24,730)
​

X
- Definition Tabular disclosure of fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and amortized cost (held-to-maturity), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References No definition available. + Details
Name: | gsbc_DebtSecuritiesAvailableForSaleAndHeldToMaturityUnrealizedLossPositionFairValueTableTextBlock
Namespace Prefix: | gsbc_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of information about investment in debt security measured at amortized cost (held-to-maturity) and fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References No definition available. + Details
Name: | gsbc_DebtSecuritiesHeldToMaturityAndAvailableForSaleSecuritiesTableTextBlock
Namespace Prefix: | gsbc_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
Name: | us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration