v3.26.1
Schedule H, Line 4i – Schedule of Assets (Held At End of Year) (Details) - EBP 001
$ in Thousands
12 Months Ended
Dec. 31, 2025
USD ($)
shares
EBP, Schedule of Asset Held for Investment [Line Items]  
Entity tax identification number 52-1188014
Plan number 002
Participant loan $ 14,477
Total investments at fair value $ 1,708,474
Minimum  
EBP, Schedule of Asset Held for Investment [Line Items]  
Participant loan interest rate 4.00%
Maximum  
EBP, Schedule of Asset Held for Investment [Line Items]  
Participant loan interest rate 9.50%
Registered investment companies  
EBP, Schedule of Asset Held for Investment [Line Items]  
Total investments at fair value $ 486,978
Common collective trusts  
EBP, Schedule of Asset Held for Investment [Line Items]  
Total investments at fair value $ 899,063
Investment, Identifier [Axis]: The Vanguard Group, Inc. | Vanguard Cash Reserve Federal MM Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of Shares/Units (in shares) | shares 381,315
Total investments at fair value $ 381
Investment, Identifier [Axis]: The Vanguard Group, Inc. | Vanguard Growth Index Fund Institutional Shares  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of Shares/Units (in shares) | shares 750,014
Total investments at fair value $ 188,366
Investment, Identifier [Axis]: The Vanguard Group, Inc. | Vanguard Inflation-Protected Securities Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of Shares/Units (in shares) | shares 1,864,394
Total investments at fair value $ 17,451
Investment, Identifier [Axis]: The Vanguard Group, Inc. | Vanguard Institutional 500 Index Trust C  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of Shares/Units (in shares) | shares 1,385,147
Total investments at fair value $ 193,117
Investment, Identifier [Axis]: The Vanguard Group, Inc. | Vanguard Institutional Total Bond Market Index Trust C  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of Shares/Units (in shares) | shares 758,428
Total investments at fair value $ 83,541
Investment, Identifier [Axis]: The Vanguard Group, Inc. | Vanguard Institutional Total International Stock Market Index Trust C  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of Shares/Units (in shares) | shares 752,926
Total investments at fair value $ 105,937
Investment, Identifier [Axis]: The Vanguard Group, Inc. | Vanguard Mid-Cap Index Fund Institutional Shares  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of Shares/Units (in shares) | shares 693,118
Total investments at fair value $ 55,020
Investment, Identifier [Axis]: The Vanguard Group, Inc. | Vanguard Retirement Savings Trust III  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of Shares/Units (in shares) | shares 69,136,321
Total investments at fair value $ 69,136
Investment, Identifier [Axis]: The Vanguard Group, Inc. | Vanguard Small-Cap Index Fund Institutional Shares  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of Shares/Units (in shares) | shares 325,265
Total investments at fair value $ 40,196
Investment, Identifier [Axis]: The Vanguard Group, Inc. | Vanguard Target Retirement 2020 Trust I  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of Shares/Units (in shares) | shares 178,389
Total investments at fair value $ 15,138
Investment, Identifier [Axis]: The Vanguard Group, Inc. | Vanguard Target Retirement 2025 Trust I  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of Shares/Units (in shares) | shares 307,597
Total investments at fair value $ 28,302
Investment, Identifier [Axis]: The Vanguard Group, Inc. | Vanguard Target Retirement 2030 Trust I  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of Shares/Units (in shares) | shares 479,934
Total investments at fair value $ 46,976
Investment, Identifier [Axis]: The Vanguard Group, Inc. | Vanguard Target Retirement 2035 Trust I  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of Shares/Units (in shares) | shares 644,842
Total investments at fair value $ 67,786
Investment, Identifier [Axis]: The Vanguard Group, Inc. | Vanguard Target Retirement 2040 Trust I  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of Shares/Units (in shares) | shares 506,705
Total investments at fair value $ 57,668
Investment, Identifier [Axis]: The Vanguard Group, Inc. | Vanguard Target Retirement 2045 Trust I  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of Shares/Units (in shares) | shares 599,089
Total investments at fair value $ 71,753
Investment, Identifier [Axis]: The Vanguard Group, Inc. | Vanguard Target Retirement 2050 Trust I  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of Shares/Units (in shares) | shares 615,134
Total investments at fair value $ 76,129
Investment, Identifier [Axis]: The Vanguard Group, Inc. | Vanguard Target Retirement 2055 Trust I  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of Shares/Units (in shares) | shares 275,203
Total investments at fair value $ 41,534
Investment, Identifier [Axis]: The Vanguard Group, Inc. | Vanguard Target Retirement 2060 Trust I  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of Shares/Units (in shares) | shares 253,150
Total investments at fair value $ 20,080
Investment, Identifier [Axis]: The Vanguard Group, Inc. | Vanguard Target Retirement 2065 Trust I  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of Shares/Units (in shares) | shares 168,731
Total investments at fair value $ 8,231
Investment, Identifier [Axis]: The Vanguard Group, Inc. | Vanguard Target Retirement 2070 Trust I  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of Shares/Units (in shares) | shares 29,796
Total investments at fair value $ 886
Investment, Identifier [Axis]: The Vanguard Group, Inc. | Vanguard Target Retirement Income Trust I  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of Shares/Units (in shares) | shares 169,780
Total investments at fair value $ 12,849
Investment, Identifier [Axis]: The Vanguard Group, Inc. | Vanguard Value Index Fund Institutional Shares  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of Shares/Units (in shares) | shares 878,569
Total investments at fair value $ 65,462
Investment, Identifier [Axis]: The Vanguard Group, Inc. | Vanguard Wellington Fund Admiral Shares  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of Shares/Units (in shares) | shares 1,555,924
Total investments at fair value $ 120,102
Investment, Identifier [Axis]: for NS stock | NS Stock Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Number of Shares/Units (in shares) | shares 3,207,541
Total investments at fair value $ 307,956