XML 14 R2.htm IDEA: XBRL DOCUMENT v3.26.1
Shareholder Report
6 Months Ended
Feb. 28, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name NEUBERGER BERMAN EQUITY FUNDS
Entity Central Index Key 0000044402
Entity Investment Company Type N-1A
Document Period End Date Feb. 28, 2026
C000069472  
Shareholder Report [Line Items]  
Fund Name Emerging Markets Equity Fund
Class Name Institutional Class
Trading Symbol NEMIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/EmergingMarketsEquity/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/EmergingMarketsEquity/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Institutional Class
$62
1.11%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 62
Expense Ratio, Percent 1.11%
AssetsNet $ 251,018,281
Holdings Count | Holding 45
InvestmentCompanyPortfolioTurnover 85.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$251,018,281
Number of Portfolio Holdings
45
Portfolio Turnover Rate
85%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Financials
18.3%
Communication Services
13.7%
Information Technology
12.9%
Consumer Discretionary
11.3%
Materials
10.1%
Consumer Staples
9.5%
Health Care
5.7%
Utilities
5.1%
Industrials
3.9%
Energy
3.0%
Real Estate
2.2%
Short-Term Investments
4.3%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.

Top Ten Countries

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
China
27.8%
Korea
14.0%
Brazil
12.5%
United States
6.0%
Indonesia
5.6%
Hong Kong
5.5%
Mexico
5.3%
Taiwan
4.4%
South Africa
4.2%
India
3.6%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Samsung Electronics Co. Ltd.
4.5%
State Street Institutional Treasury Money Market Fund Premier Class
4.3%
Telefonica Brasil SA
3.4%
PDD Holdings, Inc. ADR
3.4%
Taiwan Semiconductor Manufacturing Co. Ltd.
3.3%
Richter Gedeon Nyrt
3.1%
Petroleo Brasileiro SA - Petrobras
3.0%
Orion Corp.
3.0%
Megacable Holdings SAB de CV
2.9%
VTech Holdings Ltd.
2.9%
C000069470  
Shareholder Report [Line Items]  
Fund Name Emerging Markets Equity Fund
Class Name Class A
Trading Symbol NEMAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/EmergingMarketsEquity/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/EmergingMarketsEquity/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class A
$78
1.39%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 78
Expense Ratio, Percent 1.39%
AssetsNet $ 251,018,281
Holdings Count | Holding 45
InvestmentCompanyPortfolioTurnover 85.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$251,018,281
Number of Portfolio Holdings
45
Portfolio Turnover Rate
85%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Financials
18.3%
Communication Services
13.7%
Information Technology
12.9%
Consumer Discretionary
11.3%
Materials
10.1%
Consumer Staples
9.5%
Health Care
5.7%
Utilities
5.1%
Industrials
3.9%
Energy
3.0%
Real Estate
2.2%
Short-Term Investments
4.3%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.

Top Ten Countries

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
China
27.8%
Korea
14.0%
Brazil
12.5%
United States
6.0%
Indonesia
5.6%
Hong Kong
5.5%
Mexico
5.3%
Taiwan
4.4%
South Africa
4.2%
India
3.6%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Samsung Electronics Co. Ltd.
4.5%
State Street Institutional Treasury Money Market Fund Premier Class
4.3%
Telefonica Brasil SA
3.4%
PDD Holdings, Inc. ADR
3.4%
Taiwan Semiconductor Manufacturing Co. Ltd.
3.3%
Richter Gedeon Nyrt
3.1%
Petroleo Brasileiro SA - Petrobras
3.0%
Orion Corp.
3.0%
Megacable Holdings SAB de CV
2.9%
VTech Holdings Ltd.
2.9%
C000069471  
Shareholder Report [Line Items]  
Fund Name Emerging Markets Equity Fund
Class Name Class C
Trading Symbol NEMCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/EmergingMarketsEquity/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/EmergingMarketsEquity/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class C
$119
2.14%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 119
Expense Ratio, Percent 2.14%
AssetsNet $ 251,018,281
Holdings Count | Holding 45
InvestmentCompanyPortfolioTurnover 85.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$251,018,281
Number of Portfolio Holdings
45
Portfolio Turnover Rate
85%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Financials
18.3%
Communication Services
13.7%
Information Technology
12.9%
Consumer Discretionary
11.3%
Materials
10.1%
Consumer Staples
9.5%
Health Care
5.7%
Utilities
5.1%
Industrials
3.9%
Energy
3.0%
Real Estate
2.2%
Short-Term Investments
4.3%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.

Top Ten Countries

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
China
27.8%
Korea
14.0%
Brazil
12.5%
United States
6.0%
Indonesia
5.6%
Hong Kong
5.5%
Mexico
5.3%
Taiwan
4.4%
South Africa
4.2%
India
3.6%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Samsung Electronics Co. Ltd.
4.5%
State Street Institutional Treasury Money Market Fund Premier Class
4.3%
Telefonica Brasil SA
3.4%
PDD Holdings, Inc. ADR
3.4%
Taiwan Semiconductor Manufacturing Co. Ltd.
3.3%
Richter Gedeon Nyrt
3.1%
Petroleo Brasileiro SA - Petrobras
3.0%
Orion Corp.
3.0%
Megacable Holdings SAB de CV
2.9%
VTech Holdings Ltd.
2.9%
C000090015  
Shareholder Report [Line Items]  
Fund Name Emerging Markets Equity Fund
Class Name Class R3
Trading Symbol NEMRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/EmergingMarketsEquity/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/EmergingMarketsEquity/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class R3
$98
1.75%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 98
Expense Ratio, Percent 1.75%
AssetsNet $ 251,018,281
Holdings Count | Holding 45
InvestmentCompanyPortfolioTurnover 85.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$251,018,281
Number of Portfolio Holdings
45
Portfolio Turnover Rate
85%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Financials
18.3%
Communication Services
13.7%
Information Technology
12.9%
Consumer Discretionary
11.3%
Materials
10.1%
Consumer Staples
9.5%
Health Care
5.7%
Utilities
5.1%
Industrials
3.9%
Energy
3.0%
Real Estate
2.2%
Short-Term Investments
4.3%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.

Top Ten Countries

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
China
27.8%
Korea
14.0%
Brazil
12.5%
United States
6.0%
Indonesia
5.6%
Hong Kong
5.5%
Mexico
5.3%
Taiwan
4.4%
South Africa
4.2%
India
3.6%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Samsung Electronics Co. Ltd.
4.5%
State Street Institutional Treasury Money Market Fund Premier Class
4.3%
Telefonica Brasil SA
3.4%
PDD Holdings, Inc. ADR
3.4%
Taiwan Semiconductor Manufacturing Co. Ltd.
3.3%
Richter Gedeon Nyrt
3.1%
Petroleo Brasileiro SA - Petrobras
3.0%
Orion Corp.
3.0%
Megacable Holdings SAB de CV
2.9%
VTech Holdings Ltd.
2.9%
C000125074  
Shareholder Report [Line Items]  
Fund Name Emerging Markets Equity Fund
Class Name Class R6
Trading Symbol NREMX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/EmergingMarketsEquity/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/EmergingMarketsEquity/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class R6
$57
1.01%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 57
Expense Ratio, Percent 1.01%
AssetsNet $ 251,018,281
Holdings Count | Holding 45
InvestmentCompanyPortfolioTurnover 85.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$251,018,281
Number of Portfolio Holdings
45
Portfolio Turnover Rate
85%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Financials
18.3%
Communication Services
13.7%
Information Technology
12.9%
Consumer Discretionary
11.3%
Materials
10.1%
Consumer Staples
9.5%
Health Care
5.7%
Utilities
5.1%
Industrials
3.9%
Energy
3.0%
Real Estate
2.2%
Short-Term Investments
4.3%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.

Top Ten Countries

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
China
27.8%
Korea
14.0%
Brazil
12.5%
United States
6.0%
Indonesia
5.6%
Hong Kong
5.5%
Mexico
5.3%
Taiwan
4.4%
South Africa
4.2%
India
3.6%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Samsung Electronics Co. Ltd.
4.5%
State Street Institutional Treasury Money Market Fund Premier Class
4.3%
Telefonica Brasil SA
3.4%
PDD Holdings, Inc. ADR
3.4%
Taiwan Semiconductor Manufacturing Co. Ltd.
3.3%
Richter Gedeon Nyrt
3.1%
Petroleo Brasileiro SA - Petrobras
3.0%
Orion Corp.
3.0%
Megacable Holdings SAB de CV
2.9%
VTech Holdings Ltd.
2.9%
C000063561  
Shareholder Report [Line Items]  
Fund Name Equity Income Fund
Class Name Institutional Class
Trading Symbol NBHIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/EquityIncome/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/EquityIncome/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Institutional Class
$39
0.72%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 39
Expense Ratio, Percent 0.72%
AssetsNet $ 1,080,636,020
Holdings Count | Holding 75
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$1,080,636,020
Number of Portfolio Holdings
75
Portfolio Turnover Rate
17%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Materials
15.0%
Financials
14.4%
Industrials
11.5%
Utilities
11.4%
Health Care
8.9%
Energy
8.6%
Consumer Staples
6.8%
Information Technology
6.0%
Consumer Discretionary
5.9%
Real Estate
5.8%
Communication Services
4.1%
Short-Term Investments
1.6%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Agnico Eagle Mines Ltd.
4.8%
AstraZeneca PLC ADR
3.2%
Valterra Platinum Ltd.
3.1%
Wells Fargo & Co.
2.9%
Exxon Mobil Corp.
2.9%
JPMorgan Chase & Co.
2.8%
Ferrovial SE
2.8%
Brixmor Property Group, Inc.
2.7%
Roche Holding AG ADR
2.6%
Emerson Electric Co.
2.5%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000063559  
Shareholder Report [Line Items]  
Fund Name Equity Income Fund
Class Name Class A
Trading Symbol NBHAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/EquityIncome/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/EquityIncome/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class A
$58
1.08%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 58
Expense Ratio, Percent 1.08%
AssetsNet $ 1,080,636,020
Holdings Count | Holding 75
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$1,080,636,020
Number of Portfolio Holdings
75
Portfolio Turnover Rate
17%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Materials
15.0%
Financials
14.4%
Industrials
11.5%
Utilities
11.4%
Health Care
8.9%
Energy
8.6%
Consumer Staples
6.8%
Information Technology
6.0%
Consumer Discretionary
5.9%
Real Estate
5.8%
Communication Services
4.1%
Short-Term Investments
1.6%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Agnico Eagle Mines Ltd.
4.8%
AstraZeneca PLC ADR
3.2%
Valterra Platinum Ltd.
3.1%
Wells Fargo & Co.
2.9%
Exxon Mobil Corp.
2.9%
JPMorgan Chase & Co.
2.8%
Ferrovial SE
2.8%
Brixmor Property Group, Inc.
2.7%
Roche Holding AG ADR
2.6%
Emerson Electric Co.
2.5%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000063560  
Shareholder Report [Line Items]  
Fund Name Equity Income Fund
Class Name Class C
Trading Symbol NBHCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/EquityIncome/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/EquityIncome/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class C
$98
1.83%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 98
Expense Ratio, Percent 1.83%
AssetsNet $ 1,080,636,020
Holdings Count | Holding 75
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$1,080,636,020
Number of Portfolio Holdings
75
Portfolio Turnover Rate
17%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Materials
15.0%
Financials
14.4%
Industrials
11.5%
Utilities
11.4%
Health Care
8.9%
Energy
8.6%
Consumer Staples
6.8%
Information Technology
6.0%
Consumer Discretionary
5.9%
Real Estate
5.8%
Communication Services
4.1%
Short-Term Investments
1.6%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Agnico Eagle Mines Ltd.
4.8%
AstraZeneca PLC ADR
3.2%
Valterra Platinum Ltd.
3.1%
Wells Fargo & Co.
2.9%
Exxon Mobil Corp.
2.9%
JPMorgan Chase & Co.
2.8%
Ferrovial SE
2.8%
Brixmor Property Group, Inc.
2.7%
Roche Holding AG ADR
2.6%
Emerson Electric Co.
2.5%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000090014  
Shareholder Report [Line Items]  
Fund Name Equity Income Fund
Class Name Class R3
Trading Symbol NBHRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/EquityIncome/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/EquityIncome/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class R3
$73
1.36%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 73
Expense Ratio, Percent 1.36%
AssetsNet $ 1,080,636,020
Holdings Count | Holding 75
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$1,080,636,020
Number of Portfolio Holdings
75
Portfolio Turnover Rate
17%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Materials
15.0%
Financials
14.4%
Industrials
11.5%
Utilities
11.4%
Health Care
8.9%
Energy
8.6%
Consumer Staples
6.8%
Information Technology
6.0%
Consumer Discretionary
5.9%
Real Estate
5.8%
Communication Services
4.1%
Short-Term Investments
1.6%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Agnico Eagle Mines Ltd.
4.8%
AstraZeneca PLC ADR
3.2%
Valterra Platinum Ltd.
3.1%
Wells Fargo & Co.
2.9%
Exxon Mobil Corp.
2.9%
JPMorgan Chase & Co.
2.8%
Ferrovial SE
2.8%
Brixmor Property Group, Inc.
2.7%
Roche Holding AG ADR
2.6%
Emerson Electric Co.
2.5%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000228873  
Shareholder Report [Line Items]  
Fund Name Equity Income Fund
Class Name Class E
Trading Symbol NBHEX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/EquityIncome/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/EquityIncome/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class E
$3
0.05%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 3
Expense Ratio, Percent 0.05%
AssetsNet $ 1,080,636,020
Holdings Count | Holding 75
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$1,080,636,020
Number of Portfolio Holdings
75
Portfolio Turnover Rate
17%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Materials
15.0%
Financials
14.4%
Industrials
11.5%
Utilities
11.4%
Health Care
8.9%
Energy
8.6%
Consumer Staples
6.8%
Information Technology
6.0%
Consumer Discretionary
5.9%
Real Estate
5.8%
Communication Services
4.1%
Short-Term Investments
1.6%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Agnico Eagle Mines Ltd.
4.8%
AstraZeneca PLC ADR
3.2%
Valterra Platinum Ltd.
3.1%
Wells Fargo & Co.
2.9%
Exxon Mobil Corp.
2.9%
JPMorgan Chase & Co.
2.8%
Ferrovial SE
2.8%
Brixmor Property Group, Inc.
2.7%
Roche Holding AG ADR
2.6%
Emerson Electric Co.
2.5%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000021351  
Shareholder Report [Line Items]  
Fund Name Focus Fund
Class Name Investor Class
Trading Symbol NBSSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/Focus/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/Focus/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Investor Class
$44
0.88%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 44
Expense Ratio, Percent 0.88%
AssetsNet $ 786,310,589
Holdings Count | Holding 55
InvestmentCompanyPortfolioTurnover 37.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$786,310,589
Number of Portfolio Holdings
55
Portfolio Turnover Rate
37%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
18.6%
Financials
14.9%
Industrials
14.5%
Communication Services
11.0%
Consumer Discretionary
10.9%
Health Care
8.3%
Utilities
5.8%
Materials
4.9%
Energy
3.6%
Consumer Staples
2.7%
Real Estate
0.7%
Short-Term Investments
4.1%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
NVIDIA Corp.
4.4%
Meta Platforms, Inc. Class A
4.3%
State Street Institutional U.S. Government Money Market Fund Premier Class
4.1%
Deutsche Telekom AG
4.0%
Amazon.com, Inc.
3.9%
Airbus SE
3.5%
UniCredit SpA
3.4%
Microsoft Corp.
3.3%
Lam Research Corp.
3.1%
Agnico Eagle Mines Ltd.
2.5%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000021352  
Shareholder Report [Line Items]  
Fund Name Focus Fund
Class Name Trust Class
Trading Symbol NBFCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/Focus/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/Focus/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Trust Class
$55
1.09%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 55
Expense Ratio, Percent 1.09%
AssetsNet $ 786,310,589
Holdings Count | Holding 55
InvestmentCompanyPortfolioTurnover 37.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$786,310,589
Number of Portfolio Holdings
55
Portfolio Turnover Rate
37%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
18.6%
Financials
14.9%
Industrials
14.5%
Communication Services
11.0%
Consumer Discretionary
10.9%
Health Care
8.3%
Utilities
5.8%
Materials
4.9%
Energy
3.6%
Consumer Staples
2.7%
Real Estate
0.7%
Short-Term Investments
4.1%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
NVIDIA Corp.
4.4%
Meta Platforms, Inc. Class A
4.3%
State Street Institutional U.S. Government Money Market Fund Premier Class
4.1%
Deutsche Telekom AG
4.0%
Amazon.com, Inc.
3.9%
Airbus SE
3.5%
UniCredit SpA
3.4%
Microsoft Corp.
3.3%
Lam Research Corp.
3.1%
Agnico Eagle Mines Ltd.
2.5%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000021353  
Shareholder Report [Line Items]  
Fund Name Focus Fund
Class Name Advisor Class
Trading Symbol NBFAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/Focus/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/Focus/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Advisor Class
$72
1.43%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 72
Expense Ratio, Percent 1.43%
AssetsNet $ 786,310,589
Holdings Count | Holding 55
InvestmentCompanyPortfolioTurnover 37.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$786,310,589
Number of Portfolio Holdings
55
Portfolio Turnover Rate
37%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
18.6%
Financials
14.9%
Industrials
14.5%
Communication Services
11.0%
Consumer Discretionary
10.9%
Health Care
8.3%
Utilities
5.8%
Materials
4.9%
Energy
3.6%
Consumer Staples
2.7%
Real Estate
0.7%
Short-Term Investments
4.1%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
NVIDIA Corp.
4.4%
Meta Platforms, Inc. Class A
4.3%
State Street Institutional U.S. Government Money Market Fund Premier Class
4.1%
Deutsche Telekom AG
4.0%
Amazon.com, Inc.
3.9%
Airbus SE
3.5%
UniCredit SpA
3.4%
Microsoft Corp.
3.3%
Lam Research Corp.
3.1%
Agnico Eagle Mines Ltd.
2.5%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000027739  
Shareholder Report [Line Items]  
Fund Name Focus Fund
Class Name Institutional Class
Trading Symbol NFALX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/Focus/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/Focus/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Institutional Class
$37
0.73%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 37
Expense Ratio, Percent 0.73%
AssetsNet $ 786,310,589
Holdings Count | Holding 55
InvestmentCompanyPortfolioTurnover 37.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$786,310,589
Number of Portfolio Holdings
55
Portfolio Turnover Rate
37%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
18.6%
Financials
14.9%
Industrials
14.5%
Communication Services
11.0%
Consumer Discretionary
10.9%
Health Care
8.3%
Utilities
5.8%
Materials
4.9%
Energy
3.6%
Consumer Staples
2.7%
Real Estate
0.7%
Short-Term Investments
4.1%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
NVIDIA Corp.
4.4%
Meta Platforms, Inc. Class A
4.3%
State Street Institutional U.S. Government Money Market Fund Premier Class
4.1%
Deutsche Telekom AG
4.0%
Amazon.com, Inc.
3.9%
Airbus SE
3.5%
UniCredit SpA
3.4%
Microsoft Corp.
3.3%
Lam Research Corp.
3.1%
Agnico Eagle Mines Ltd.
2.5%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000090012  
Shareholder Report [Line Items]  
Fund Name Focus Fund
Class Name Class A
Trading Symbol NFAAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/Focus/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/Focus/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class A
$56
1.11%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 56
Expense Ratio, Percent 1.11%
AssetsNet $ 786,310,589
Holdings Count | Holding 55
InvestmentCompanyPortfolioTurnover 37.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$786,310,589
Number of Portfolio Holdings
55
Portfolio Turnover Rate
37%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
18.6%
Financials
14.9%
Industrials
14.5%
Communication Services
11.0%
Consumer Discretionary
10.9%
Health Care
8.3%
Utilities
5.8%
Materials
4.9%
Energy
3.6%
Consumer Staples
2.7%
Real Estate
0.7%
Short-Term Investments
4.1%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
NVIDIA Corp.
4.4%
Meta Platforms, Inc. Class A
4.3%
State Street Institutional U.S. Government Money Market Fund Premier Class
4.1%
Deutsche Telekom AG
4.0%
Amazon.com, Inc.
3.9%
Airbus SE
3.5%
UniCredit SpA
3.4%
Microsoft Corp.
3.3%
Lam Research Corp.
3.1%
Agnico Eagle Mines Ltd.
2.5%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000090013  
Shareholder Report [Line Items]  
Fund Name Focus Fund
Class Name Class C
Trading Symbol NFACX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/Focus/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/Focus/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class C
$94
1.86%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 94
Expense Ratio, Percent 1.86%
AssetsNet $ 786,310,589
Holdings Count | Holding 55
InvestmentCompanyPortfolioTurnover 37.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$786,310,589
Number of Portfolio Holdings
55
Portfolio Turnover Rate
37%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
18.6%
Financials
14.9%
Industrials
14.5%
Communication Services
11.0%
Consumer Discretionary
10.9%
Health Care
8.3%
Utilities
5.8%
Materials
4.9%
Energy
3.6%
Consumer Staples
2.7%
Real Estate
0.7%
Short-Term Investments
4.1%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
NVIDIA Corp.
4.4%
Meta Platforms, Inc. Class A
4.3%
State Street Institutional U.S. Government Money Market Fund Premier Class
4.1%
Deutsche Telekom AG
4.0%
Amazon.com, Inc.
3.9%
Airbus SE
3.5%
UniCredit SpA
3.4%
Microsoft Corp.
3.3%
Lam Research Corp.
3.1%
Agnico Eagle Mines Ltd.
2.5%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000021336  
Shareholder Report [Line Items]  
Fund Name Genesis Fund
Class Name Investor Class
Trading Symbol NBGNX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/Genesis/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/Genesis/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Investor Class
$51
1.00%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 51
Expense Ratio, Percent 1.00%
AssetsNet $ 8,558,371,060
Holdings Count | Holding 111
InvestmentCompanyPortfolioTurnover 12.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$8,558,371,060
Number of Portfolio Holdings
111
Portfolio Turnover Rate
12%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
34.9%
Financials
17.6%
Information Technology
14.2%
Consumer Discretionary
6.9%
Energy
6.3%
Health Care
5.6%
Utilities
5.4%
Materials
4.0%
Real Estate
2.2%
Communication Services
2.2%
Short-Term Investments
0.7%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Valmont Industries, Inc.
2.0%
Littelfuse, Inc.
2.0%
White Mountains Insurance Group Ltd.
1.9%
RBC Bearings, Inc.
1.9%
MKS, Inc.
1.8%
Tidewater, Inc.
1.8%
Kirby Corp.
1.8%
Lattice Semiconductor Corp.
1.7%
Nexstar Media Group, Inc. Class A
1.6%
Community Financial System, Inc.
1.6%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000021337  
Shareholder Report [Line Items]  
Fund Name Genesis Fund
Class Name Trust Class
Trading Symbol NBGEX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/Genesis/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/Genesis/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Trust Class
$55
1.09%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 55
Expense Ratio, Percent 1.09%
AssetsNet $ 8,558,371,060
Holdings Count | Holding 111
InvestmentCompanyPortfolioTurnover 12.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$8,558,371,060
Number of Portfolio Holdings
111
Portfolio Turnover Rate
12%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
34.9%
Financials
17.6%
Information Technology
14.2%
Consumer Discretionary
6.9%
Energy
6.3%
Health Care
5.6%
Utilities
5.4%
Materials
4.0%
Real Estate
2.2%
Communication Services
2.2%
Short-Term Investments
0.7%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Valmont Industries, Inc.
2.0%
Littelfuse, Inc.
2.0%
White Mountains Insurance Group Ltd.
1.9%
RBC Bearings, Inc.
1.9%
MKS, Inc.
1.8%
Tidewater, Inc.
1.8%
Kirby Corp.
1.8%
Lattice Semiconductor Corp.
1.7%
Nexstar Media Group, Inc. Class A
1.6%
Community Financial System, Inc.
1.6%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000021338  
Shareholder Report [Line Items]  
Fund Name Genesis Fund
Class Name Advisor Class
Trading Symbol NBGAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/Genesis/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/Genesis/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Advisor Class
$68
1.35%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 68
Expense Ratio, Percent 1.35%
AssetsNet $ 8,558,371,060
Holdings Count | Holding 111
InvestmentCompanyPortfolioTurnover 12.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$8,558,371,060
Number of Portfolio Holdings
111
Portfolio Turnover Rate
12%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
34.9%
Financials
17.6%
Information Technology
14.2%
Consumer Discretionary
6.9%
Energy
6.3%
Health Care
5.6%
Utilities
5.4%
Materials
4.0%
Real Estate
2.2%
Communication Services
2.2%
Short-Term Investments
0.7%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Valmont Industries, Inc.
2.0%
Littelfuse, Inc.
2.0%
White Mountains Insurance Group Ltd.
1.9%
RBC Bearings, Inc.
1.9%
MKS, Inc.
1.8%
Tidewater, Inc.
1.8%
Kirby Corp.
1.8%
Lattice Semiconductor Corp.
1.7%
Nexstar Media Group, Inc. Class A
1.6%
Community Financial System, Inc.
1.6%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000021339  
Shareholder Report [Line Items]  
Fund Name Genesis Fund
Class Name Institutional Class
Trading Symbol NBGIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/Genesis/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/Genesis/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Institutional Class
$42
0.84%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 42
Expense Ratio, Percent 0.84%
AssetsNet $ 8,558,371,060
Holdings Count | Holding 111
InvestmentCompanyPortfolioTurnover 12.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$8,558,371,060
Number of Portfolio Holdings
111
Portfolio Turnover Rate
12%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
34.9%
Financials
17.6%
Information Technology
14.2%
Consumer Discretionary
6.9%
Energy
6.3%
Health Care
5.6%
Utilities
5.4%
Materials
4.0%
Real Estate
2.2%
Communication Services
2.2%
Short-Term Investments
0.7%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Valmont Industries, Inc.
2.0%
Littelfuse, Inc.
2.0%
White Mountains Insurance Group Ltd.
1.9%
RBC Bearings, Inc.
1.9%
MKS, Inc.
1.8%
Tidewater, Inc.
1.8%
Kirby Corp.
1.8%
Lattice Semiconductor Corp.
1.7%
Nexstar Media Group, Inc. Class A
1.6%
Community Financial System, Inc.
1.6%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000125070  
Shareholder Report [Line Items]  
Fund Name Genesis Fund
Class Name Class R6
Trading Symbol NRGSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/Genesis/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/Genesis/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class R6
$37
0.74%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 37
Expense Ratio, Percent 0.74%
AssetsNet $ 8,558,371,060
Holdings Count | Holding 111
InvestmentCompanyPortfolioTurnover 12.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$8,558,371,060
Number of Portfolio Holdings
111
Portfolio Turnover Rate
12%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
34.9%
Financials
17.6%
Information Technology
14.2%
Consumer Discretionary
6.9%
Energy
6.3%
Health Care
5.6%
Utilities
5.4%
Materials
4.0%
Real Estate
2.2%
Communication Services
2.2%
Short-Term Investments
0.7%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Valmont Industries, Inc.
2.0%
Littelfuse, Inc.
2.0%
White Mountains Insurance Group Ltd.
1.9%
RBC Bearings, Inc.
1.9%
MKS, Inc.
1.8%
Tidewater, Inc.
1.8%
Kirby Corp.
1.8%
Lattice Semiconductor Corp.
1.7%
Nexstar Media Group, Inc. Class A
1.6%
Community Financial System, Inc.
1.6%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000228870  
Shareholder Report [Line Items]  
Fund Name Genesis Fund
Class Name Class E
Trading Symbol NRGEX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/Genesis/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/Genesis/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class E
$1
0.02%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 1
Expense Ratio, Percent 0.02%
AssetsNet $ 8,558,371,060
Holdings Count | Holding 111
InvestmentCompanyPortfolioTurnover 12.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$8,558,371,060
Number of Portfolio Holdings
111
Portfolio Turnover Rate
12%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
34.9%
Financials
17.6%
Information Technology
14.2%
Consumer Discretionary
6.9%
Energy
6.3%
Health Care
5.6%
Utilities
5.4%
Materials
4.0%
Real Estate
2.2%
Communication Services
2.2%
Short-Term Investments
0.7%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Valmont Industries, Inc.
2.0%
Littelfuse, Inc.
2.0%
White Mountains Insurance Group Ltd.
1.9%
RBC Bearings, Inc.
1.9%
MKS, Inc.
1.8%
Tidewater, Inc.
1.8%
Kirby Corp.
1.8%
Lattice Semiconductor Corp.
1.7%
Nexstar Media Group, Inc. Class A
1.6%
Community Financial System, Inc.
1.6%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000121825  
Shareholder Report [Line Items]  
Fund Name International Equity Fund
Class Name Investor Class
Trading Symbol NIQVX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/InternationalEquity/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/InternationalEquity/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Investor Class
$56
1.06%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 56
Expense Ratio, Percent 1.06%
AssetsNet $ 1,119,021,894
Holdings Count | Holding 96
InvestmentCompanyPortfolioTurnover 38.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$1,119,021,894
Number of Portfolio Holdings
96
Portfolio Turnover Rate
38%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
26.0%
Financials
21.5%
Information Technology
12.6%
Health Care
10.1%
Materials
8.1%
Consumer Discretionary
7.4%
Consumer Staples
6.2%
Energy
3.2%
Utilities
1.7%
Real Estate
0.7%
Communication Services
0.5%
Short-Term Investments
2.0%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.

Top Ten Countries

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
United Kingdom
17.2%
Japan
16.0%
Germany
10.8%
United States
10.8%
France
9.6%
Netherlands
5.4%
Switzerland
3.6%
Italy
3.4%
Austria
2.9%
Korea
2.5%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Siemens AG
2.4%
Anheuser-Busch InBev SA
2.2%
ASML Holding NV
2.1%
Siemens Energy AG
2.0%
AstraZeneca PLC
1.8%
Japan Post Bank Co. Ltd.
1.8%
UniCredit SpA
1.8%
Erste Group Bank AG
1.8%
ING Groep NV
1.8%
RWE AG
1.7%
C000121826  
Shareholder Report [Line Items]  
Fund Name International Equity Fund
Class Name Trust Class
Trading Symbol NIQTX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/InternationalEquity/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/InternationalEquity/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Trust Class
$59
1.13%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 59
Expense Ratio, Percent 1.13%
AssetsNet $ 1,119,021,894
Holdings Count | Holding 96
InvestmentCompanyPortfolioTurnover 38.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$1,119,021,894
Number of Portfolio Holdings
96
Portfolio Turnover Rate
38%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
26.0%
Financials
21.5%
Information Technology
12.6%
Health Care
10.1%
Materials
8.1%
Consumer Discretionary
7.4%
Consumer Staples
6.2%
Energy
3.2%
Utilities
1.7%
Real Estate
0.7%
Communication Services
0.5%
Short-Term Investments
2.0%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.

Top Ten Countries

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
United Kingdom
17.2%
Japan
16.0%
Germany
10.8%
United States
10.8%
France
9.6%
Netherlands
5.4%
Switzerland
3.6%
Italy
3.4%
Austria
2.9%
Korea
2.5%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Siemens AG
2.4%
Anheuser-Busch InBev SA
2.2%
ASML Holding NV
2.1%
Siemens Energy AG
2.0%
AstraZeneca PLC
1.8%
Japan Post Bank Co. Ltd.
1.8%
UniCredit SpA
1.8%
Erste Group Bank AG
1.8%
ING Groep NV
1.8%
RWE AG
1.7%
C000021340  
Shareholder Report [Line Items]  
Fund Name International Equity Fund
Class Name Institutional Class
Trading Symbol NBIIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/InternationalEquity/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/InternationalEquity/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Institutional Class
$45
0.85%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.85%
AssetsNet $ 1,119,021,894
Holdings Count | Holding 96
InvestmentCompanyPortfolioTurnover 38.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$1,119,021,894
Number of Portfolio Holdings
96
Portfolio Turnover Rate
38%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
26.0%
Financials
21.5%
Information Technology
12.6%
Health Care
10.1%
Materials
8.1%
Consumer Discretionary
7.4%
Consumer Staples
6.2%
Energy
3.2%
Utilities
1.7%
Real Estate
0.7%
Communication Services
0.5%
Short-Term Investments
2.0%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.

Top Ten Countries

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
United Kingdom
17.2%
Japan
16.0%
Germany
10.8%
United States
10.8%
France
9.6%
Netherlands
5.4%
Switzerland
3.6%
Italy
3.4%
Austria
2.9%
Korea
2.5%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Siemens AG
2.4%
Anheuser-Busch InBev SA
2.2%
ASML Holding NV
2.1%
Siemens Energy AG
2.0%
AstraZeneca PLC
1.8%
Japan Post Bank Co. Ltd.
1.8%
UniCredit SpA
1.8%
Erste Group Bank AG
1.8%
ING Groep NV
1.8%
RWE AG
1.7%
C000121822  
Shareholder Report [Line Items]  
Fund Name International Equity Fund
Class Name Class A
Trading Symbol NIQAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/InternationalEquity/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/InternationalEquity/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class A
$64
1.21%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 64
Expense Ratio, Percent 1.21%
AssetsNet $ 1,119,021,894
Holdings Count | Holding 96
InvestmentCompanyPortfolioTurnover 38.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$1,119,021,894
Number of Portfolio Holdings
96
Portfolio Turnover Rate
38%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
26.0%
Financials
21.5%
Information Technology
12.6%
Health Care
10.1%
Materials
8.1%
Consumer Discretionary
7.4%
Consumer Staples
6.2%
Energy
3.2%
Utilities
1.7%
Real Estate
0.7%
Communication Services
0.5%
Short-Term Investments
2.0%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.

Top Ten Countries

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
United Kingdom
17.2%
Japan
16.0%
Germany
10.8%
United States
10.8%
France
9.6%
Netherlands
5.4%
Switzerland
3.6%
Italy
3.4%
Austria
2.9%
Korea
2.5%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Siemens AG
2.4%
Anheuser-Busch InBev SA
2.2%
ASML Holding NV
2.1%
Siemens Energy AG
2.0%
AstraZeneca PLC
1.8%
Japan Post Bank Co. Ltd.
1.8%
UniCredit SpA
1.8%
Erste Group Bank AG
1.8%
ING Groep NV
1.8%
RWE AG
1.7%
C000121823  
Shareholder Report [Line Items]  
Fund Name International Equity Fund
Class Name Class C
Trading Symbol NIQCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/InternationalEquity/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/InternationalEquity/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class C
$103
1.96%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 103
Expense Ratio, Percent 1.96%
AssetsNet $ 1,119,021,894
Holdings Count | Holding 96
InvestmentCompanyPortfolioTurnover 38.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$1,119,021,894
Number of Portfolio Holdings
96
Portfolio Turnover Rate
38%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
26.0%
Financials
21.5%
Information Technology
12.6%
Health Care
10.1%
Materials
8.1%
Consumer Discretionary
7.4%
Consumer Staples
6.2%
Energy
3.2%
Utilities
1.7%
Real Estate
0.7%
Communication Services
0.5%
Short-Term Investments
2.0%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.

Top Ten Countries

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
United Kingdom
17.2%
Japan
16.0%
Germany
10.8%
United States
10.8%
France
9.6%
Netherlands
5.4%
Switzerland
3.6%
Italy
3.4%
Austria
2.9%
Korea
2.5%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Siemens AG
2.4%
Anheuser-Busch InBev SA
2.2%
ASML Holding NV
2.1%
Siemens Energy AG
2.0%
AstraZeneca PLC
1.8%
Japan Post Bank Co. Ltd.
1.8%
UniCredit SpA
1.8%
Erste Group Bank AG
1.8%
ING Groep NV
1.8%
RWE AG
1.7%
C000130576  
Shareholder Report [Line Items]  
Fund Name International Equity Fund
Class Name Class R6
Trading Symbol NRIQX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/InternationalEquity/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/InternationalEquity/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class R6
$40
0.75%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 40
Expense Ratio, Percent 0.75%
AssetsNet $ 1,119,021,894
Holdings Count | Holding 96
InvestmentCompanyPortfolioTurnover 38.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$1,119,021,894
Number of Portfolio Holdings
96
Portfolio Turnover Rate
38%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
26.0%
Financials
21.5%
Information Technology
12.6%
Health Care
10.1%
Materials
8.1%
Consumer Discretionary
7.4%
Consumer Staples
6.2%
Energy
3.2%
Utilities
1.7%
Real Estate
0.7%
Communication Services
0.5%
Short-Term Investments
2.0%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.

Top Ten Countries

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
United Kingdom
17.2%
Japan
16.0%
Germany
10.8%
United States
10.8%
France
9.6%
Netherlands
5.4%
Switzerland
3.6%
Italy
3.4%
Austria
2.9%
Korea
2.5%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Siemens AG
2.4%
Anheuser-Busch InBev SA
2.2%
ASML Holding NV
2.1%
Siemens Energy AG
2.0%
AstraZeneca PLC
1.8%
Japan Post Bank Co. Ltd.
1.8%
UniCredit SpA
1.8%
Erste Group Bank AG
1.8%
ING Groep NV
1.8%
RWE AG
1.7%
C000228871  
Shareholder Report [Line Items]  
Fund Name International Equity Fund
Class Name Class E
Trading Symbol NIQEX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/InternationalEquity/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/InternationalEquity/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class E
$3
0.06%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 3
Expense Ratio, Percent 0.06%
AssetsNet $ 1,119,021,894
Holdings Count | Holding 96
InvestmentCompanyPortfolioTurnover 38.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$1,119,021,894
Number of Portfolio Holdings
96
Portfolio Turnover Rate
38%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
26.0%
Financials
21.5%
Information Technology
12.6%
Health Care
10.1%
Materials
8.1%
Consumer Discretionary
7.4%
Consumer Staples
6.2%
Energy
3.2%
Utilities
1.7%
Real Estate
0.7%
Communication Services
0.5%
Short-Term Investments
2.0%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.

Top Ten Countries

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
United Kingdom
17.2%
Japan
16.0%
Germany
10.8%
United States
10.8%
France
9.6%
Netherlands
5.4%
Switzerland
3.6%
Italy
3.4%
Austria
2.9%
Korea
2.5%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Siemens AG
2.4%
Anheuser-Busch InBev SA
2.2%
ASML Holding NV
2.1%
Siemens Energy AG
2.0%
AstraZeneca PLC
1.8%
Japan Post Bank Co. Ltd.
1.8%
UniCredit SpA
1.8%
Erste Group Bank AG
1.8%
ING Groep NV
1.8%
RWE AG
1.7%
C000034262  
Shareholder Report [Line Items]  
Fund Name International Select Fund
Class Name Trust Class
Trading Symbol NILTX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/InternationalSelect/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/InternationalSelect/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Trust Class
$61
1.15%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 61
Expense Ratio, Percent 1.15%
AssetsNet $ 272,640,134
Holdings Count | Holding 82
InvestmentCompanyPortfolioTurnover 43.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$272,640,134
Number of Portfolio Holdings
82
Portfolio Turnover Rate
43%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
24.1%
Financials
22.4%
Information Technology
13.3%
Health Care
10.4%
Materials
8.2%
Consumer Discretionary
7.7%
Consumer Staples
6.1%
Energy
3.3%
Utilities
1.7%
Communication Services
0.5%
Short-Term Investments
2.3%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.

Top Ten Countries

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
United Kingdom
17.1%
Japan
14.0%
United States
13.3%
Germany
11.7%
France
11.3%
Netherlands
5.7%
Austria
3.1%
Korea
3.1%
Switzerland
2.6%
Denmark
2.3%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Siemens AG
2.6%
State Street Navigator Securities Lending Government Money Market Portfolio
2.3%
Anheuser-Busch InBev SA
2.2%
Siemens Energy AG
2.2%
ASML Holding NV
2.0%
AstraZeneca PLC
2.0%
Erste Group Bank AG
1.9%
ING Groep NV
1.9%
Resona Holdings, Inc.
1.9%
SLB Ltd.
1.8%
C000035184  
Shareholder Report [Line Items]  
Fund Name International Select Fund
Class Name Institutional Class
Trading Symbol NILIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/InternationalSelect/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/InternationalSelect/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Institutional Class
$42
0.80%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 42
Expense Ratio, Percent 0.80%
AssetsNet $ 272,640,134
Holdings Count | Holding 82
InvestmentCompanyPortfolioTurnover 43.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$272,640,134
Number of Portfolio Holdings
82
Portfolio Turnover Rate
43%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
24.1%
Financials
22.4%
Information Technology
13.3%
Health Care
10.4%
Materials
8.2%
Consumer Discretionary
7.7%
Consumer Staples
6.1%
Energy
3.3%
Utilities
1.7%
Communication Services
0.5%
Short-Term Investments
2.3%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.

Top Ten Countries

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
United Kingdom
17.1%
Japan
14.0%
United States
13.3%
Germany
11.7%
France
11.3%
Netherlands
5.7%
Austria
3.1%
Korea
3.1%
Switzerland
2.6%
Denmark
2.3%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Siemens AG
2.6%
State Street Navigator Securities Lending Government Money Market Portfolio
2.3%
Anheuser-Busch InBev SA
2.2%
Siemens Energy AG
2.2%
ASML Holding NV
2.0%
AstraZeneca PLC
2.0%
Erste Group Bank AG
1.9%
ING Groep NV
1.9%
Resona Holdings, Inc.
1.9%
SLB Ltd.
1.8%
C000057306  
Shareholder Report [Line Items]  
Fund Name International Select Fund
Class Name Class A
Trading Symbol NBNAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/InternationalSelect/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/InternationalSelect/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class A
$61
1.16%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 61
Expense Ratio, Percent 1.16%
AssetsNet $ 272,640,134
Holdings Count | Holding 82
InvestmentCompanyPortfolioTurnover 43.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$272,640,134
Number of Portfolio Holdings
82
Portfolio Turnover Rate
43%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
24.1%
Financials
22.4%
Information Technology
13.3%
Health Care
10.4%
Materials
8.2%
Consumer Discretionary
7.7%
Consumer Staples
6.1%
Energy
3.3%
Utilities
1.7%
Communication Services
0.5%
Short-Term Investments
2.3%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.

Top Ten Countries

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
United Kingdom
17.1%
Japan
14.0%
United States
13.3%
Germany
11.7%
France
11.3%
Netherlands
5.7%
Austria
3.1%
Korea
3.1%
Switzerland
2.6%
Denmark
2.3%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Siemens AG
2.6%
State Street Navigator Securities Lending Government Money Market Portfolio
2.3%
Anheuser-Busch InBev SA
2.2%
Siemens Energy AG
2.2%
ASML Holding NV
2.0%
AstraZeneca PLC
2.0%
Erste Group Bank AG
1.9%
ING Groep NV
1.9%
Resona Holdings, Inc.
1.9%
SLB Ltd.
1.8%
C000057307  
Shareholder Report [Line Items]  
Fund Name International Select Fund
Class Name Class C
Trading Symbol NBNCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/InternationalSelect/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/InternationalSelect/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class C
$101
1.91%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 101
Expense Ratio, Percent 1.91%
AssetsNet $ 272,640,134
Holdings Count | Holding 82
InvestmentCompanyPortfolioTurnover 43.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$272,640,134
Number of Portfolio Holdings
82
Portfolio Turnover Rate
43%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
24.1%
Financials
22.4%
Information Technology
13.3%
Health Care
10.4%
Materials
8.2%
Consumer Discretionary
7.7%
Consumer Staples
6.1%
Energy
3.3%
Utilities
1.7%
Communication Services
0.5%
Short-Term Investments
2.3%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.

Top Ten Countries

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
United Kingdom
17.1%
Japan
14.0%
United States
13.3%
Germany
11.7%
France
11.3%
Netherlands
5.7%
Austria
3.1%
Korea
3.1%
Switzerland
2.6%
Denmark
2.3%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Siemens AG
2.6%
State Street Navigator Securities Lending Government Money Market Portfolio
2.3%
Anheuser-Busch InBev SA
2.2%
Siemens Energy AG
2.2%
ASML Holding NV
2.0%
AstraZeneca PLC
2.0%
Erste Group Bank AG
1.9%
ING Groep NV
1.9%
Resona Holdings, Inc.
1.9%
SLB Ltd.
1.8%
C000077166  
Shareholder Report [Line Items]  
Fund Name International Select Fund
Class Name Class R3
Trading Symbol NBNRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/InternationalSelect/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/InternationalSelect/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class R3
$74
1.41%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 74
Expense Ratio, Percent 1.41%
AssetsNet $ 272,640,134
Holdings Count | Holding 82
InvestmentCompanyPortfolioTurnover 43.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$272,640,134
Number of Portfolio Holdings
82
Portfolio Turnover Rate
43%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
24.1%
Financials
22.4%
Information Technology
13.3%
Health Care
10.4%
Materials
8.2%
Consumer Discretionary
7.7%
Consumer Staples
6.1%
Energy
3.3%
Utilities
1.7%
Communication Services
0.5%
Short-Term Investments
2.3%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.

Top Ten Countries

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
United Kingdom
17.1%
Japan
14.0%
United States
13.3%
Germany
11.7%
France
11.3%
Netherlands
5.7%
Austria
3.1%
Korea
3.1%
Switzerland
2.6%
Denmark
2.3%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Siemens AG
2.6%
State Street Navigator Securities Lending Government Money Market Portfolio
2.3%
Anheuser-Busch InBev SA
2.2%
Siemens Energy AG
2.2%
ASML Holding NV
2.0%
AstraZeneca PLC
2.0%
Erste Group Bank AG
1.9%
ING Groep NV
1.9%
Resona Holdings, Inc.
1.9%
SLB Ltd.
1.8%
C000160231  
Shareholder Report [Line Items]  
Fund Name International Select Fund
Class Name Class R6
Trading Symbol NRILX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/InternationalSelect/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/InternationalSelect/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class R6
$38
0.71%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.71%
AssetsNet $ 272,640,134
Holdings Count | Holding 82
InvestmentCompanyPortfolioTurnover 43.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$272,640,134
Number of Portfolio Holdings
82
Portfolio Turnover Rate
43%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
24.1%
Financials
22.4%
Information Technology
13.3%
Health Care
10.4%
Materials
8.2%
Consumer Discretionary
7.7%
Consumer Staples
6.1%
Energy
3.3%
Utilities
1.7%
Communication Services
0.5%
Short-Term Investments
2.3%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.

Top Ten Countries

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
United Kingdom
17.1%
Japan
14.0%
United States
13.3%
Germany
11.7%
France
11.3%
Netherlands
5.7%
Austria
3.1%
Korea
3.1%
Switzerland
2.6%
Denmark
2.3%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Siemens AG
2.6%
State Street Navigator Securities Lending Government Money Market Portfolio
2.3%
Anheuser-Busch InBev SA
2.2%
Siemens Energy AG
2.2%
ASML Holding NV
2.0%
AstraZeneca PLC
2.0%
Erste Group Bank AG
1.9%
ING Groep NV
1.9%
Resona Holdings, Inc.
1.9%
SLB Ltd.
1.8%
C000087774  
Shareholder Report [Line Items]  
Fund Name Intrinsic Value Fund
Class Name Institutional Class
Trading Symbol NINLX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/IntrinsicValue/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/IntrinsicValue/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Institutional Class
$51
0.95%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 51
Expense Ratio, Percent 0.95%
AssetsNet $ 1,300,810,068
Holdings Count | Holding 99
InvestmentCompanyPortfolioTurnover 11.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$1,300,810,068
Number of Portfolio Holdings
99
Portfolio Turnover Rate
11%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
31.5%
Industrials
22.3%
Utilities
10.0%
Health Care
8.3%
Energy
6.5%
Consumer Discretionary
6.2%
Financials
5.9%
Materials
4.2%
Communication Services
3.1%
Consumer Staples
0.9%
Short-Term Investments
1.1%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Viasat, Inc.
4.8%
Resideo Technologies, Inc.
3.3%
Ormat Technologies, Inc.
2.7%
AerCap Holdings NV
2.6%
Enviri Corp.
2.4%
Veeco Instruments, Inc.
2.3%
IPG Photonics Corp.
2.2%
Huntington Bancshares, Inc.
2.1%
KBR, Inc.
2.1%
Rambus, Inc.
2.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000087772  
Shareholder Report [Line Items]  
Fund Name Intrinsic Value Fund
Class Name Class A
Trading Symbol NINAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/IntrinsicValue/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/IntrinsicValue/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class A
$71
1.32%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 71
Expense Ratio, Percent 1.32%
AssetsNet $ 1,300,810,068
Holdings Count | Holding 99
InvestmentCompanyPortfolioTurnover 11.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$1,300,810,068
Number of Portfolio Holdings
99
Portfolio Turnover Rate
11%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
31.5%
Industrials
22.3%
Utilities
10.0%
Health Care
8.3%
Energy
6.5%
Consumer Discretionary
6.2%
Financials
5.9%
Materials
4.2%
Communication Services
3.1%
Consumer Staples
0.9%
Short-Term Investments
1.1%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Viasat, Inc.
4.8%
Resideo Technologies, Inc.
3.3%
Ormat Technologies, Inc.
2.7%
AerCap Holdings NV
2.6%
Enviri Corp.
2.4%
Veeco Instruments, Inc.
2.3%
IPG Photonics Corp.
2.2%
Huntington Bancshares, Inc.
2.1%
KBR, Inc.
2.1%
Rambus, Inc.
2.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000087773  
Shareholder Report [Line Items]  
Fund Name Intrinsic Value Fund
Class Name Class C
Trading Symbol NINCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/IntrinsicValue/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/IntrinsicValue/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class C
$111
2.06%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 111
Expense Ratio, Percent 2.06%
AssetsNet $ 1,300,810,068
Holdings Count | Holding 99
InvestmentCompanyPortfolioTurnover 11.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$1,300,810,068
Number of Portfolio Holdings
99
Portfolio Turnover Rate
11%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
31.5%
Industrials
22.3%
Utilities
10.0%
Health Care
8.3%
Energy
6.5%
Consumer Discretionary
6.2%
Financials
5.9%
Materials
4.2%
Communication Services
3.1%
Consumer Staples
0.9%
Short-Term Investments
1.1%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Viasat, Inc.
4.8%
Resideo Technologies, Inc.
3.3%
Ormat Technologies, Inc.
2.7%
AerCap Holdings NV
2.6%
Enviri Corp.
2.4%
Veeco Instruments, Inc.
2.3%
IPG Photonics Corp.
2.2%
Huntington Bancshares, Inc.
2.1%
KBR, Inc.
2.1%
Rambus, Inc.
2.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000150163  
Shareholder Report [Line Items]  
Fund Name Intrinsic Value Fund
Class Name Class R6
Trading Symbol NRINX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/IntrinsicValue/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/IntrinsicValue/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class R6
$46
0.85%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.85%
AssetsNet $ 1,300,810,068
Holdings Count | Holding 99
InvestmentCompanyPortfolioTurnover 11.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$1,300,810,068
Number of Portfolio Holdings
99
Portfolio Turnover Rate
11%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
31.5%
Industrials
22.3%
Utilities
10.0%
Health Care
8.3%
Energy
6.5%
Consumer Discretionary
6.2%
Financials
5.9%
Materials
4.2%
Communication Services
3.1%
Consumer Staples
0.9%
Short-Term Investments
1.1%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Viasat, Inc.
4.8%
Resideo Technologies, Inc.
3.3%
Ormat Technologies, Inc.
2.7%
AerCap Holdings NV
2.6%
Enviri Corp.
2.4%
Veeco Instruments, Inc.
2.3%
IPG Photonics Corp.
2.2%
Huntington Bancshares, Inc.
2.1%
KBR, Inc.
2.1%
Rambus, Inc.
2.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000021354  
Shareholder Report [Line Items]  
Fund Name Large Cap Growth Fund
Class Name Investor Class
Trading Symbol NGUAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/LargeCapGrowth/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/LargeCapGrowth/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Investor Class
$39
0.79%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 39
Expense Ratio, Percent 0.79%
AssetsNet $ 2,459,321,574
Holdings Count | Holding 72
InvestmentCompanyPortfolioTurnover 16.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$2,459,321,574
Number of Portfolio Holdings
72
Portfolio Turnover Rate
16%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
36.0%
Communication Services
16.1%
Consumer Discretionary
13.3%
Financials
12.1%
Industrials
9.2%
Health Care
6.7%
Utilities
2.6%
Consumer Staples
2.5%
Energy
0.7%
Short-Term Investments
0.8%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
NVIDIA Corp.
8.2%
Alphabet, Inc. Class A
7.7%
Microsoft Corp.
7.6%
Amazon.com, Inc.
6.3%
Apple, Inc.
5.9%
Meta Platforms, Inc. Class A
4.7%
Fanatics Holdings, Inc. Class A
3.9%
Broadcom, Inc.
3.9%
Eli Lilly & Co.
3.1%
Netflix, Inc.
3.1%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000021355  
Shareholder Report [Line Items]  
Fund Name Large Cap Growth Fund
Class Name Trust Class
Trading Symbol NBGTX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/LargeCapGrowth/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/LargeCapGrowth/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Trust Class
$49
1.00%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 49
Expense Ratio, Percent 1.00%
AssetsNet $ 2,459,321,574
Holdings Count | Holding 72
InvestmentCompanyPortfolioTurnover 16.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$2,459,321,574
Number of Portfolio Holdings
72
Portfolio Turnover Rate
16%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
36.0%
Communication Services
16.1%
Consumer Discretionary
13.3%
Financials
12.1%
Industrials
9.2%
Health Care
6.7%
Utilities
2.6%
Consumer Staples
2.5%
Energy
0.7%
Short-Term Investments
0.8%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
NVIDIA Corp.
8.2%
Alphabet, Inc. Class A
7.7%
Microsoft Corp.
7.6%
Amazon.com, Inc.
6.3%
Apple, Inc.
5.9%
Meta Platforms, Inc. Class A
4.7%
Fanatics Holdings, Inc. Class A
3.9%
Broadcom, Inc.
3.9%
Eli Lilly & Co.
3.1%
Netflix, Inc.
3.1%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000021356  
Shareholder Report [Line Items]  
Fund Name Large Cap Growth Fund
Class Name Advisor Class
Trading Symbol NBGUX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/LargeCapGrowth/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/LargeCapGrowth/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Advisor Class
$74
1.50%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 74
Expense Ratio, Percent 1.50%
AssetsNet $ 2,459,321,574
Holdings Count | Holding 72
InvestmentCompanyPortfolioTurnover 16.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$2,459,321,574
Number of Portfolio Holdings
72
Portfolio Turnover Rate
16%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
36.0%
Communication Services
16.1%
Consumer Discretionary
13.3%
Financials
12.1%
Industrials
9.2%
Health Care
6.7%
Utilities
2.6%
Consumer Staples
2.5%
Energy
0.7%
Short-Term Investments
0.8%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
NVIDIA Corp.
8.2%
Alphabet, Inc. Class A
7.7%
Microsoft Corp.
7.6%
Amazon.com, Inc.
6.3%
Apple, Inc.
5.9%
Meta Platforms, Inc. Class A
4.7%
Fanatics Holdings, Inc. Class A
3.9%
Broadcom, Inc.
3.9%
Eli Lilly & Co.
3.1%
Netflix, Inc.
3.1%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000027740  
Shareholder Report [Line Items]  
Fund Name Large Cap Growth Fund
Class Name Institutional Class
Trading Symbol NGDLX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/LargeCapGrowth/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/LargeCapGrowth/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Institutional Class
$32
0.65%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 32
Expense Ratio, Percent 0.65%
AssetsNet $ 2,459,321,574
Holdings Count | Holding 72
InvestmentCompanyPortfolioTurnover 16.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$2,459,321,574
Number of Portfolio Holdings
72
Portfolio Turnover Rate
16%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
36.0%
Communication Services
16.1%
Consumer Discretionary
13.3%
Financials
12.1%
Industrials
9.2%
Health Care
6.7%
Utilities
2.6%
Consumer Staples
2.5%
Energy
0.7%
Short-Term Investments
0.8%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
NVIDIA Corp.
8.2%
Alphabet, Inc. Class A
7.7%
Microsoft Corp.
7.6%
Amazon.com, Inc.
6.3%
Apple, Inc.
5.9%
Meta Platforms, Inc. Class A
4.7%
Fanatics Holdings, Inc. Class A
3.9%
Broadcom, Inc.
3.9%
Eli Lilly & Co.
3.1%
Netflix, Inc.
3.1%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000077157  
Shareholder Report [Line Items]  
Fund Name Large Cap Growth Fund
Class Name Class A
Trading Symbol NGDAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/LargeCapGrowth/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/LargeCapGrowth/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class A
$50
1.02%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 50
Expense Ratio, Percent 1.02%
AssetsNet $ 2,459,321,574
Holdings Count | Holding 72
InvestmentCompanyPortfolioTurnover 16.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$2,459,321,574
Number of Portfolio Holdings
72
Portfolio Turnover Rate
16%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
36.0%
Communication Services
16.1%
Consumer Discretionary
13.3%
Financials
12.1%
Industrials
9.2%
Health Care
6.7%
Utilities
2.6%
Consumer Staples
2.5%
Energy
0.7%
Short-Term Investments
0.8%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
NVIDIA Corp.
8.2%
Alphabet, Inc. Class A
7.7%
Microsoft Corp.
7.6%
Amazon.com, Inc.
6.3%
Apple, Inc.
5.9%
Meta Platforms, Inc. Class A
4.7%
Fanatics Holdings, Inc. Class A
3.9%
Broadcom, Inc.
3.9%
Eli Lilly & Co.
3.1%
Netflix, Inc.
3.1%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000077158  
Shareholder Report [Line Items]  
Fund Name Large Cap Growth Fund
Class Name Class C
Trading Symbol NGDCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/LargeCapGrowth/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/LargeCapGrowth/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class C
$87
1.76%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 87
Expense Ratio, Percent 1.76%
AssetsNet $ 2,459,321,574
Holdings Count | Holding 72
InvestmentCompanyPortfolioTurnover 16.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$2,459,321,574
Number of Portfolio Holdings
72
Portfolio Turnover Rate
16%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
36.0%
Communication Services
16.1%
Consumer Discretionary
13.3%
Financials
12.1%
Industrials
9.2%
Health Care
6.7%
Utilities
2.6%
Consumer Staples
2.5%
Energy
0.7%
Short-Term Investments
0.8%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
NVIDIA Corp.
8.2%
Alphabet, Inc. Class A
7.7%
Microsoft Corp.
7.6%
Amazon.com, Inc.
6.3%
Apple, Inc.
5.9%
Meta Platforms, Inc. Class A
4.7%
Fanatics Holdings, Inc. Class A
3.9%
Broadcom, Inc.
3.9%
Eli Lilly & Co.
3.1%
Netflix, Inc.
3.1%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000077160  
Shareholder Report [Line Items]  
Fund Name Large Cap Growth Fund
Class Name Class R3
Trading Symbol NGDRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/LargeCapGrowth/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/LargeCapGrowth/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class R3
$64
1.29%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 64
Expense Ratio, Percent 1.29%
AssetsNet $ 2,459,321,574
Holdings Count | Holding 72
InvestmentCompanyPortfolioTurnover 16.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$2,459,321,574
Number of Portfolio Holdings
72
Portfolio Turnover Rate
16%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
36.0%
Communication Services
16.1%
Consumer Discretionary
13.3%
Financials
12.1%
Industrials
9.2%
Health Care
6.7%
Utilities
2.6%
Consumer Staples
2.5%
Energy
0.7%
Short-Term Investments
0.8%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
NVIDIA Corp.
8.2%
Alphabet, Inc. Class A
7.7%
Microsoft Corp.
7.6%
Amazon.com, Inc.
6.3%
Apple, Inc.
5.9%
Meta Platforms, Inc. Class A
4.7%
Fanatics Holdings, Inc. Class A
3.9%
Broadcom, Inc.
3.9%
Eli Lilly & Co.
3.1%
Netflix, Inc.
3.1%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000210977  
Shareholder Report [Line Items]  
Fund Name Large Cap Growth Fund
Class Name Class R6
Trading Symbol NGRDX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/LargeCapGrowth/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/LargeCapGrowth/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class R6
$27
0.55%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 27
Expense Ratio, Percent 0.55%
AssetsNet $ 2,459,321,574
Holdings Count | Holding 72
InvestmentCompanyPortfolioTurnover 16.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$2,459,321,574
Number of Portfolio Holdings
72
Portfolio Turnover Rate
16%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
36.0%
Communication Services
16.1%
Consumer Discretionary
13.3%
Financials
12.1%
Industrials
9.2%
Health Care
6.7%
Utilities
2.6%
Consumer Staples
2.5%
Energy
0.7%
Short-Term Investments
0.8%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
NVIDIA Corp.
8.2%
Alphabet, Inc. Class A
7.7%
Microsoft Corp.
7.6%
Amazon.com, Inc.
6.3%
Apple, Inc.
5.9%
Meta Platforms, Inc. Class A
4.7%
Fanatics Holdings, Inc. Class A
3.9%
Broadcom, Inc.
3.9%
Eli Lilly & Co.
3.1%
Netflix, Inc.
3.1%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000021333  
Shareholder Report [Line Items]  
Fund Name Large Cap Value Fund
Class Name Investor Class
Trading Symbol NPRTX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/LargeCapValue/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/LargeCapValue/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Investor Class
$40
0.74%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 40
Expense Ratio, Percent 0.74%
AssetsNet $ 9,461,723,277
Holdings Count | Holding 81
InvestmentCompanyPortfolioTurnover 29.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$9,461,723,277
Number of Portfolio Holdings
81
Portfolio Turnover Rate
29%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Financials
17.1%
Health Care
15.1%
Materials
14.8%
Industrials
12.6%
Energy
12.5%
Information Technology
5.6%
Communication Services
4.7%
Consumer Discretionary
4.6%
Consumer Staples
4.3%
Utilities
2.2%
Real Estate
0.0%
Short-Term Investments
6.5%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Exxon Mobil Corp.
5.0%
State Street Institutional U.S. Government Money Market Fund Premier Class
4.9%
Southern Copper Corp.
4.0%
Johnson & Johnson
3.2%
Boeing Co.
3.0%
JPMorgan Chase & Co.
2.7%
Chevron Corp.
2.6%
CME Group, Inc.
2.1%
Freeport-McMoRan, Inc.
2.0%
Medtronic PLC
1.9%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000021334  
Shareholder Report [Line Items]  
Fund Name Large Cap Value Fund
Class Name Trust Class
Trading Symbol NBPTX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/LargeCapValue/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/LargeCapValue/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Trust Class
$52
0.95%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 52
Expense Ratio, Percent 0.95%
AssetsNet $ 9,461,723,277
Holdings Count | Holding 81
InvestmentCompanyPortfolioTurnover 29.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$9,461,723,277
Number of Portfolio Holdings
81
Portfolio Turnover Rate
29%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Financials
17.1%
Health Care
15.1%
Materials
14.8%
Industrials
12.6%
Energy
12.5%
Information Technology
5.6%
Communication Services
4.7%
Consumer Discretionary
4.6%
Consumer Staples
4.3%
Utilities
2.2%
Real Estate
0.0%
Short-Term Investments
6.5%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Exxon Mobil Corp.
5.0%
State Street Institutional U.S. Government Money Market Fund Premier Class
4.9%
Southern Copper Corp.
4.0%
Johnson & Johnson
3.2%
Boeing Co.
3.0%
JPMorgan Chase & Co.
2.7%
Chevron Corp.
2.6%
CME Group, Inc.
2.1%
Freeport-McMoRan, Inc.
2.0%
Medtronic PLC
1.9%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000021335  
Shareholder Report [Line Items]  
Fund Name Large Cap Value Fund
Class Name Advisor Class
Trading Symbol NBPBX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/LargeCapValue/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/LargeCapValue/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Advisor Class
$60
1.10%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 60
Expense Ratio, Percent 1.10%
AssetsNet $ 9,461,723,277
Holdings Count | Holding 81
InvestmentCompanyPortfolioTurnover 29.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$9,461,723,277
Number of Portfolio Holdings
81
Portfolio Turnover Rate
29%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Financials
17.1%
Health Care
15.1%
Materials
14.8%
Industrials
12.6%
Energy
12.5%
Information Technology
5.6%
Communication Services
4.7%
Consumer Discretionary
4.6%
Consumer Staples
4.3%
Utilities
2.2%
Real Estate
0.0%
Short-Term Investments
6.5%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Exxon Mobil Corp.
5.0%
State Street Institutional U.S. Government Money Market Fund Premier Class
4.9%
Southern Copper Corp.
4.0%
Johnson & Johnson
3.2%
Boeing Co.
3.0%
JPMorgan Chase & Co.
2.7%
Chevron Corp.
2.6%
CME Group, Inc.
2.1%
Freeport-McMoRan, Inc.
2.0%
Medtronic PLC
1.9%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000027735  
Shareholder Report [Line Items]  
Fund Name Large Cap Value Fund
Class Name Institutional Class
Trading Symbol NBPIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/LargeCapValue/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/LargeCapValue/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Institutional Class
$33
0.60%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 33
Expense Ratio, Percent 0.60%
AssetsNet $ 9,461,723,277
Holdings Count | Holding 81
InvestmentCompanyPortfolioTurnover 29.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$9,461,723,277
Number of Portfolio Holdings
81
Portfolio Turnover Rate
29%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Financials
17.1%
Health Care
15.1%
Materials
14.8%
Industrials
12.6%
Energy
12.5%
Information Technology
5.6%
Communication Services
4.7%
Consumer Discretionary
4.6%
Consumer Staples
4.3%
Utilities
2.2%
Real Estate
0.0%
Short-Term Investments
6.5%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Exxon Mobil Corp.
5.0%
State Street Institutional U.S. Government Money Market Fund Premier Class
4.9%
Southern Copper Corp.
4.0%
Johnson & Johnson
3.2%
Boeing Co.
3.0%
JPMorgan Chase & Co.
2.7%
Chevron Corp.
2.6%
CME Group, Inc.
2.1%
Freeport-McMoRan, Inc.
2.0%
Medtronic PLC
1.9%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000090001  
Shareholder Report [Line Items]  
Fund Name Large Cap Value Fund
Class Name Class A
Trading Symbol NPNAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/LargeCapValue/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/LargeCapValue/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class A
$52
0.96%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 52
Expense Ratio, Percent 0.96%
AssetsNet $ 9,461,723,277
Holdings Count | Holding 81
InvestmentCompanyPortfolioTurnover 29.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$9,461,723,277
Number of Portfolio Holdings
81
Portfolio Turnover Rate
29%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Financials
17.1%
Health Care
15.1%
Materials
14.8%
Industrials
12.6%
Energy
12.5%
Information Technology
5.6%
Communication Services
4.7%
Consumer Discretionary
4.6%
Consumer Staples
4.3%
Utilities
2.2%
Real Estate
0.0%
Short-Term Investments
6.5%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Exxon Mobil Corp.
5.0%
State Street Institutional U.S. Government Money Market Fund Premier Class
4.9%
Southern Copper Corp.
4.0%
Johnson & Johnson
3.2%
Boeing Co.
3.0%
JPMorgan Chase & Co.
2.7%
Chevron Corp.
2.6%
CME Group, Inc.
2.1%
Freeport-McMoRan, Inc.
2.0%
Medtronic PLC
1.9%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000089999  
Shareholder Report [Line Items]  
Fund Name Large Cap Value Fund
Class Name Class C
Trading Symbol NPNCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/LargeCapValue/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/LargeCapValue/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class C
$93
1.71%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 93
Expense Ratio, Percent 1.71%
AssetsNet $ 9,461,723,277
Holdings Count | Holding 81
InvestmentCompanyPortfolioTurnover 29.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$9,461,723,277
Number of Portfolio Holdings
81
Portfolio Turnover Rate
29%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Financials
17.1%
Health Care
15.1%
Materials
14.8%
Industrials
12.6%
Energy
12.5%
Information Technology
5.6%
Communication Services
4.7%
Consumer Discretionary
4.6%
Consumer Staples
4.3%
Utilities
2.2%
Real Estate
0.0%
Short-Term Investments
6.5%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Exxon Mobil Corp.
5.0%
State Street Institutional U.S. Government Money Market Fund Premier Class
4.9%
Southern Copper Corp.
4.0%
Johnson & Johnson
3.2%
Boeing Co.
3.0%
JPMorgan Chase & Co.
2.7%
Chevron Corp.
2.6%
CME Group, Inc.
2.1%
Freeport-McMoRan, Inc.
2.0%
Medtronic PLC
1.9%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000090000  
Shareholder Report [Line Items]  
Fund Name Large Cap Value Fund
Class Name Class R3
Trading Symbol NPNRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/LargeCapValue/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/LargeCapValue/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class R3
$67
1.23%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 67
Expense Ratio, Percent 1.23%
AssetsNet $ 9,461,723,277
Holdings Count | Holding 81
InvestmentCompanyPortfolioTurnover 29.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$9,461,723,277
Number of Portfolio Holdings
81
Portfolio Turnover Rate
29%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Financials
17.1%
Health Care
15.1%
Materials
14.8%
Industrials
12.6%
Energy
12.5%
Information Technology
5.6%
Communication Services
4.7%
Consumer Discretionary
4.6%
Consumer Staples
4.3%
Utilities
2.2%
Real Estate
0.0%
Short-Term Investments
6.5%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Exxon Mobil Corp.
5.0%
State Street Institutional U.S. Government Money Market Fund Premier Class
4.9%
Southern Copper Corp.
4.0%
Johnson & Johnson
3.2%
Boeing Co.
3.0%
JPMorgan Chase & Co.
2.7%
Chevron Corp.
2.6%
CME Group, Inc.
2.1%
Freeport-McMoRan, Inc.
2.0%
Medtronic PLC
1.9%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000150162  
Shareholder Report [Line Items]  
Fund Name Large Cap Value Fund
Class Name Class R6
Trading Symbol NRLCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/LargeCapValue/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/LargeCapValue/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class R6
$27
0.50%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 27
Expense Ratio, Percent 0.50%
AssetsNet $ 9,461,723,277
Holdings Count | Holding 81
InvestmentCompanyPortfolioTurnover 29.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$9,461,723,277
Number of Portfolio Holdings
81
Portfolio Turnover Rate
29%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Financials
17.1%
Health Care
15.1%
Materials
14.8%
Industrials
12.6%
Energy
12.5%
Information Technology
5.6%
Communication Services
4.7%
Consumer Discretionary
4.6%
Consumer Staples
4.3%
Utilities
2.2%
Real Estate
0.0%
Short-Term Investments
6.5%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Exxon Mobil Corp.
5.0%
State Street Institutional U.S. Government Money Market Fund Premier Class
4.9%
Southern Copper Corp.
4.0%
Johnson & Johnson
3.2%
Boeing Co.
3.0%
JPMorgan Chase & Co.
2.7%
Chevron Corp.
2.6%
CME Group, Inc.
2.1%
Freeport-McMoRan, Inc.
2.0%
Medtronic PLC
1.9%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000228869  
Shareholder Report [Line Items]  
Fund Name Large Cap Value Fund
Class Name Class E
Trading Symbol NPNEX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/LargeCapValue/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/LargeCapValue/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class E
$1
0.02%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 1
Expense Ratio, Percent 0.02%
AssetsNet $ 9,461,723,277
Holdings Count | Holding 81
InvestmentCompanyPortfolioTurnover 29.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$9,461,723,277
Number of Portfolio Holdings
81
Portfolio Turnover Rate
29%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Financials
17.1%
Health Care
15.1%
Materials
14.8%
Industrials
12.6%
Energy
12.5%
Information Technology
5.6%
Communication Services
4.7%
Consumer Discretionary
4.6%
Consumer Staples
4.3%
Utilities
2.2%
Real Estate
0.0%
Short-Term Investments
6.5%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Exxon Mobil Corp.
5.0%
State Street Institutional U.S. Government Money Market Fund Premier Class
4.9%
Southern Copper Corp.
4.0%
Johnson & Johnson
3.2%
Boeing Co.
3.0%
JPMorgan Chase & Co.
2.7%
Chevron Corp.
2.6%
CME Group, Inc.
2.1%
Freeport-McMoRan, Inc.
2.0%
Medtronic PLC
1.9%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000021357  
Shareholder Report [Line Items]  
Fund Name Mid Cap Growth Fund
Class Name Investor Class
Trading Symbol NMANX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/MidCapGrowth/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/MidCapGrowth/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Investor Class
$40
0.82%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 40
Expense Ratio, Percent 0.82%
AssetsNet $ 1,991,618,374
Holdings Count | Holding 76
InvestmentCompanyPortfolioTurnover 91.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$1,991,618,374
Number of Portfolio Holdings
76
Portfolio Turnover Rate
91%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
25.9%
Consumer Discretionary
20.4%
Information Technology
17.8%
Health Care
16.5%
Financials
7.7%
Energy
3.3%
Consumer Staples
2.4%
Communication Services
2.4%
Utilities
1.2%
Materials
0.6%
Short-Term Investments
1.8%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Cencora, Inc.
4.1%
Hilton Worldwide Holdings, Inc.
3.7%
Howmet Aerospace, Inc.
3.7%
Vertiv Holdings Co. Class A
3.7%
Royal Caribbean Cruises Ltd.
3.2%
Quanta Services, Inc.
2.9%
Cloudflare, Inc. Class A
2.6%
IDEXX Laboratories, Inc.
2.5%
Cardinal Health, Inc.
2.4%
Fastenal Co.
2.3%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000021358  
Shareholder Report [Line Items]  
Fund Name Mid Cap Growth Fund
Class Name Trust Class
Trading Symbol NBMTX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/MidCapGrowth/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/MidCapGrowth/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Trust Class
$45
0.92%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.92%
AssetsNet $ 1,991,618,374
Holdings Count | Holding 76
InvestmentCompanyPortfolioTurnover 91.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$1,991,618,374
Number of Portfolio Holdings
76
Portfolio Turnover Rate
91%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
25.9%
Consumer Discretionary
20.4%
Information Technology
17.8%
Health Care
16.5%
Financials
7.7%
Energy
3.3%
Consumer Staples
2.4%
Communication Services
2.4%
Utilities
1.2%
Materials
0.6%
Short-Term Investments
1.8%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Cencora, Inc.
4.1%
Hilton Worldwide Holdings, Inc.
3.7%
Howmet Aerospace, Inc.
3.7%
Vertiv Holdings Co. Class A
3.7%
Royal Caribbean Cruises Ltd.
3.2%
Quanta Services, Inc.
2.9%
Cloudflare, Inc. Class A
2.6%
IDEXX Laboratories, Inc.
2.5%
Cardinal Health, Inc.
2.4%
Fastenal Co.
2.3%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000021359  
Shareholder Report [Line Items]  
Fund Name Mid Cap Growth Fund
Class Name Advisor Class
Trading Symbol NBMBX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/MidCapGrowth/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/MidCapGrowth/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Advisor Class
$57
1.17%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 57
Expense Ratio, Percent 1.17%
AssetsNet $ 1,991,618,374
Holdings Count | Holding 76
InvestmentCompanyPortfolioTurnover 91.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$1,991,618,374
Number of Portfolio Holdings
76
Portfolio Turnover Rate
91%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
25.9%
Consumer Discretionary
20.4%
Information Technology
17.8%
Health Care
16.5%
Financials
7.7%
Energy
3.3%
Consumer Staples
2.4%
Communication Services
2.4%
Utilities
1.2%
Materials
0.6%
Short-Term Investments
1.8%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Cencora, Inc.
4.1%
Hilton Worldwide Holdings, Inc.
3.7%
Howmet Aerospace, Inc.
3.7%
Vertiv Holdings Co. Class A
3.7%
Royal Caribbean Cruises Ltd.
3.2%
Quanta Services, Inc.
2.9%
Cloudflare, Inc. Class A
2.6%
IDEXX Laboratories, Inc.
2.5%
Cardinal Health, Inc.
2.4%
Fastenal Co.
2.3%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000027741  
Shareholder Report [Line Items]  
Fund Name Mid Cap Growth Fund
Class Name Institutional Class
Trading Symbol NBMLX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/MidCapGrowth/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/MidCapGrowth/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Institutional Class
$32
0.66%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 32
Expense Ratio, Percent 0.66%
AssetsNet $ 1,991,618,374
Holdings Count | Holding 76
InvestmentCompanyPortfolioTurnover 91.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$1,991,618,374
Number of Portfolio Holdings
76
Portfolio Turnover Rate
91%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
25.9%
Consumer Discretionary
20.4%
Information Technology
17.8%
Health Care
16.5%
Financials
7.7%
Energy
3.3%
Consumer Staples
2.4%
Communication Services
2.4%
Utilities
1.2%
Materials
0.6%
Short-Term Investments
1.8%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Cencora, Inc.
4.1%
Hilton Worldwide Holdings, Inc.
3.7%
Howmet Aerospace, Inc.
3.7%
Vertiv Holdings Co. Class A
3.7%
Royal Caribbean Cruises Ltd.
3.2%
Quanta Services, Inc.
2.9%
Cloudflare, Inc. Class A
2.6%
IDEXX Laboratories, Inc.
2.5%
Cardinal Health, Inc.
2.4%
Fastenal Co.
2.3%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000077161  
Shareholder Report [Line Items]  
Fund Name Mid Cap Growth Fund
Class Name Class A
Trading Symbol NMGAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/MidCapGrowth/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/MidCapGrowth/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class A
$50
1.03%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 50
Expense Ratio, Percent 1.03%
AssetsNet $ 1,991,618,374
Holdings Count | Holding 76
InvestmentCompanyPortfolioTurnover 91.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$1,991,618,374
Number of Portfolio Holdings
76
Portfolio Turnover Rate
91%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
25.9%
Consumer Discretionary
20.4%
Information Technology
17.8%
Health Care
16.5%
Financials
7.7%
Energy
3.3%
Consumer Staples
2.4%
Communication Services
2.4%
Utilities
1.2%
Materials
0.6%
Short-Term Investments
1.8%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Cencora, Inc.
4.1%
Hilton Worldwide Holdings, Inc.
3.7%
Howmet Aerospace, Inc.
3.7%
Vertiv Holdings Co. Class A
3.7%
Royal Caribbean Cruises Ltd.
3.2%
Quanta Services, Inc.
2.9%
Cloudflare, Inc. Class A
2.6%
IDEXX Laboratories, Inc.
2.5%
Cardinal Health, Inc.
2.4%
Fastenal Co.
2.3%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000077162  
Shareholder Report [Line Items]  
Fund Name Mid Cap Growth Fund
Class Name Class C
Trading Symbol NMGCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/MidCapGrowth/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/MidCapGrowth/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class C
$87
1.79%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 87
Expense Ratio, Percent 1.79%
AssetsNet $ 1,991,618,374
Holdings Count | Holding 76
InvestmentCompanyPortfolioTurnover 91.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$1,991,618,374
Number of Portfolio Holdings
76
Portfolio Turnover Rate
91%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
25.9%
Consumer Discretionary
20.4%
Information Technology
17.8%
Health Care
16.5%
Financials
7.7%
Energy
3.3%
Consumer Staples
2.4%
Communication Services
2.4%
Utilities
1.2%
Materials
0.6%
Short-Term Investments
1.8%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Cencora, Inc.
4.1%
Hilton Worldwide Holdings, Inc.
3.7%
Howmet Aerospace, Inc.
3.7%
Vertiv Holdings Co. Class A
3.7%
Royal Caribbean Cruises Ltd.
3.2%
Quanta Services, Inc.
2.9%
Cloudflare, Inc. Class A
2.6%
IDEXX Laboratories, Inc.
2.5%
Cardinal Health, Inc.
2.4%
Fastenal Co.
2.3%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000077164  
Shareholder Report [Line Items]  
Fund Name Mid Cap Growth Fund
Class Name Class R3
Trading Symbol NMGRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/MidCapGrowth/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/MidCapGrowth/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class R3
$62
1.29%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 62
Expense Ratio, Percent 1.29%
AssetsNet $ 1,991,618,374
Holdings Count | Holding 76
InvestmentCompanyPortfolioTurnover 91.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$1,991,618,374
Number of Portfolio Holdings
76
Portfolio Turnover Rate
91%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
25.9%
Consumer Discretionary
20.4%
Information Technology
17.8%
Health Care
16.5%
Financials
7.7%
Energy
3.3%
Consumer Staples
2.4%
Communication Services
2.4%
Utilities
1.2%
Materials
0.6%
Short-Term Investments
1.8%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Cencora, Inc.
4.1%
Hilton Worldwide Holdings, Inc.
3.7%
Howmet Aerospace, Inc.
3.7%
Vertiv Holdings Co. Class A
3.7%
Royal Caribbean Cruises Ltd.
3.2%
Quanta Services, Inc.
2.9%
Cloudflare, Inc. Class A
2.6%
IDEXX Laboratories, Inc.
2.5%
Cardinal Health, Inc.
2.4%
Fastenal Co.
2.3%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000125073  
Shareholder Report [Line Items]  
Fund Name Mid Cap Growth Fund
Class Name Class R6
Trading Symbol NRMGX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/MidCapGrowth/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/MidCapGrowth/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class R6
$28
0.57%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 28
Expense Ratio, Percent 0.57%
AssetsNet $ 1,991,618,374
Holdings Count | Holding 76
InvestmentCompanyPortfolioTurnover 91.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$1,991,618,374
Number of Portfolio Holdings
76
Portfolio Turnover Rate
91%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
25.9%
Consumer Discretionary
20.4%
Information Technology
17.8%
Health Care
16.5%
Financials
7.7%
Energy
3.3%
Consumer Staples
2.4%
Communication Services
2.4%
Utilities
1.2%
Materials
0.6%
Short-Term Investments
1.8%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Cencora, Inc.
4.1%
Hilton Worldwide Holdings, Inc.
3.7%
Howmet Aerospace, Inc.
3.7%
Vertiv Holdings Co. Class A
3.7%
Royal Caribbean Cruises Ltd.
3.2%
Quanta Services, Inc.
2.9%
Cloudflare, Inc. Class A
2.6%
IDEXX Laboratories, Inc.
2.5%
Cardinal Health, Inc.
2.4%
Fastenal Co.
2.3%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000021347  
Shareholder Report [Line Items]  
Fund Name Mid Cap Intrinsic Value Fund
Class Name Investor Class
Trading Symbol NBRVX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/MidCapIntrinsic/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/MidCapIntrinsic/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Investor Class
$51
0.96%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 51
Expense Ratio, Percent 0.96%
AssetsNet $ 51,821,914
Holdings Count | Holding 76
InvestmentCompanyPortfolioTurnover 15.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$51,821,914
Number of Portfolio Holdings
76
Portfolio Turnover Rate
15%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
25.5%
Industrials
21.2%
Consumer Discretionary
10.1%
Financials
9.5%
Utilities
7.5%
Energy
7.2%
Health Care
6.5%
Real Estate
5.4%
Consumer Staples
3.3%
Materials
2.2%
Communication Services
1.6%
Short-Term Investments
0.0%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
IPG Photonics Corp.
2.9%
L3Harris Technologies, Inc.
2.6%
Williams Cos., Inc.
2.6%
Teledyne Technologies, Inc.
2.6%
CenterPoint Energy, Inc.
2.6%
Gates Industrial Corp. PLC
2.4%
AerCap Holdings NV
2.3%
McKesson Corp.
2.2%
Travel & Leisure Co.
2.2%
FirstEnergy Corp.
2.1%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000021348  
Shareholder Report [Line Items]  
Fund Name Mid Cap Intrinsic Value Fund
Class Name Trust Class
Trading Symbol NBREX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/MidCapIntrinsic/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/MidCapIntrinsic/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Trust Class
$63
1.20%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 63
Expense Ratio, Percent 1.20%
AssetsNet $ 51,821,914
Holdings Count | Holding 76
InvestmentCompanyPortfolioTurnover 15.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$51,821,914
Number of Portfolio Holdings
76
Portfolio Turnover Rate
15%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
25.5%
Industrials
21.2%
Consumer Discretionary
10.1%
Financials
9.5%
Utilities
7.5%
Energy
7.2%
Health Care
6.5%
Real Estate
5.4%
Consumer Staples
3.3%
Materials
2.2%
Communication Services
1.6%
Short-Term Investments
0.0%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
IPG Photonics Corp.
2.9%
L3Harris Technologies, Inc.
2.6%
Williams Cos., Inc.
2.6%
Teledyne Technologies, Inc.
2.6%
CenterPoint Energy, Inc.
2.6%
Gates Industrial Corp. PLC
2.4%
AerCap Holdings NV
2.3%
McKesson Corp.
2.2%
Travel & Leisure Co.
2.2%
FirstEnergy Corp.
2.1%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000027737  
Shareholder Report [Line Items]  
Fund Name Mid Cap Intrinsic Value Fund
Class Name Institutional Class
Trading Symbol NBRTX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/MidCapIntrinsic/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/MidCapIntrinsic/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Institutional Class
$45
0.85%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.85%
AssetsNet $ 51,821,914
Holdings Count | Holding 76
InvestmentCompanyPortfolioTurnover 15.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$51,821,914
Number of Portfolio Holdings
76
Portfolio Turnover Rate
15%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
25.5%
Industrials
21.2%
Consumer Discretionary
10.1%
Financials
9.5%
Utilities
7.5%
Energy
7.2%
Health Care
6.5%
Real Estate
5.4%
Consumer Staples
3.3%
Materials
2.2%
Communication Services
1.6%
Short-Term Investments
0.0%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
IPG Photonics Corp.
2.9%
L3Harris Technologies, Inc.
2.6%
Williams Cos., Inc.
2.6%
Teledyne Technologies, Inc.
2.6%
CenterPoint Energy, Inc.
2.6%
Gates Industrial Corp. PLC
2.4%
AerCap Holdings NV
2.3%
McKesson Corp.
2.2%
Travel & Leisure Co.
2.2%
FirstEnergy Corp.
2.1%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000090009  
Shareholder Report [Line Items]  
Fund Name Mid Cap Intrinsic Value Fund
Class Name Class A
Trading Symbol NBRAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/MidCapIntrinsic/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/MidCapIntrinsic/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class A
$64
1.21%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 64
Expense Ratio, Percent 1.21%
AssetsNet $ 51,821,914
Holdings Count | Holding 76
InvestmentCompanyPortfolioTurnover 15.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$51,821,914
Number of Portfolio Holdings
76
Portfolio Turnover Rate
15%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
25.5%
Industrials
21.2%
Consumer Discretionary
10.1%
Financials
9.5%
Utilities
7.5%
Energy
7.2%
Health Care
6.5%
Real Estate
5.4%
Consumer Staples
3.3%
Materials
2.2%
Communication Services
1.6%
Short-Term Investments
0.0%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
IPG Photonics Corp.
2.9%
L3Harris Technologies, Inc.
2.6%
Williams Cos., Inc.
2.6%
Teledyne Technologies, Inc.
2.6%
CenterPoint Energy, Inc.
2.6%
Gates Industrial Corp. PLC
2.4%
AerCap Holdings NV
2.3%
McKesson Corp.
2.2%
Travel & Leisure Co.
2.2%
FirstEnergy Corp.
2.1%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000090010  
Shareholder Report [Line Items]  
Fund Name Mid Cap Intrinsic Value Fund
Class Name Class C
Trading Symbol NBRCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/MidCapIntrinsic/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/MidCapIntrinsic/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class C
$103
1.96%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 103
Expense Ratio, Percent 1.96%
AssetsNet $ 51,821,914
Holdings Count | Holding 76
InvestmentCompanyPortfolioTurnover 15.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$51,821,914
Number of Portfolio Holdings
76
Portfolio Turnover Rate
15%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
25.5%
Industrials
21.2%
Consumer Discretionary
10.1%
Financials
9.5%
Utilities
7.5%
Energy
7.2%
Health Care
6.5%
Real Estate
5.4%
Consumer Staples
3.3%
Materials
2.2%
Communication Services
1.6%
Short-Term Investments
0.0%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
IPG Photonics Corp.
2.9%
L3Harris Technologies, Inc.
2.6%
Williams Cos., Inc.
2.6%
Teledyne Technologies, Inc.
2.6%
CenterPoint Energy, Inc.
2.6%
Gates Industrial Corp. PLC
2.4%
AerCap Holdings NV
2.3%
McKesson Corp.
2.2%
Travel & Leisure Co.
2.2%
FirstEnergy Corp.
2.1%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000090011  
Shareholder Report [Line Items]  
Fund Name Mid Cap Intrinsic Value Fund
Class Name Class R3
Trading Symbol NBRRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/MidCapIntrinsic/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/MidCapIntrinsic/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class R3
$77
1.47%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 77
Expense Ratio, Percent 1.47%
AssetsNet $ 51,821,914
Holdings Count | Holding 76
InvestmentCompanyPortfolioTurnover 15.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$51,821,914
Number of Portfolio Holdings
76
Portfolio Turnover Rate
15%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
25.5%
Industrials
21.2%
Consumer Discretionary
10.1%
Financials
9.5%
Utilities
7.5%
Energy
7.2%
Health Care
6.5%
Real Estate
5.4%
Consumer Staples
3.3%
Materials
2.2%
Communication Services
1.6%
Short-Term Investments
0.0%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
IPG Photonics Corp.
2.9%
L3Harris Technologies, Inc.
2.6%
Williams Cos., Inc.
2.6%
Teledyne Technologies, Inc.
2.6%
CenterPoint Energy, Inc.
2.6%
Gates Industrial Corp. PLC
2.4%
AerCap Holdings NV
2.3%
McKesson Corp.
2.2%
Travel & Leisure Co.
2.2%
FirstEnergy Corp.
2.1%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000210976  
Shareholder Report [Line Items]  
Fund Name Mid Cap Intrinsic Value Fund
Class Name Class R6
Trading Symbol NBMRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/MidCapIntrinsic/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/MidCapIntrinsic/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class R6
$40
0.75%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 40
Expense Ratio, Percent 0.75%
AssetsNet $ 51,821,914
Holdings Count | Holding 76
InvestmentCompanyPortfolioTurnover 15.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$51,821,914
Number of Portfolio Holdings
76
Portfolio Turnover Rate
15%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
25.5%
Industrials
21.2%
Consumer Discretionary
10.1%
Financials
9.5%
Utilities
7.5%
Energy
7.2%
Health Care
6.5%
Real Estate
5.4%
Consumer Staples
3.3%
Materials
2.2%
Communication Services
1.6%
Short-Term Investments
0.0%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
IPG Photonics Corp.
2.9%
L3Harris Technologies, Inc.
2.6%
Williams Cos., Inc.
2.6%
Teledyne Technologies, Inc.
2.6%
CenterPoint Energy, Inc.
2.6%
Gates Industrial Corp. PLC
2.4%
AerCap Holdings NV
2.3%
McKesson Corp.
2.2%
Travel & Leisure Co.
2.2%
FirstEnergy Corp.
2.1%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000082272  
Shareholder Report [Line Items]  
Fund Name Multi-Cap Opportunities Fund
Class Name Institutional Class
Trading Symbol NMULX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/MultiCapOpportunities/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/MultiCapOpportunities/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Institutional Class
$45
0.89%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.89%
AssetsNet $ 251,489,341
Holdings Count | Holding 47
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$251,489,341
Number of Portfolio Holdings
47
Portfolio Turnover Rate
17%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
21.8%
Financials
21.8%
Consumer Discretionary
14.2%
Industrials
12.6%
Communication Services
8.4%
Health Care
6.6%
Consumer Staples
5.7%
Utilities
3.7%
Materials
3.5%
Energy
1.3%
Short-Term Investments
0.4%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Alphabet, Inc. Class C
5.4%
Apple, Inc.
4.5%
NVIDIA Corp.
4.5%
Microsoft Corp.
3.9%
Brookfield Corp.
3.8%
Berkshire Hathaway, Inc. Class B
3.7%
Amazon.com, Inc.
3.6%
U.S. Foods Holding Corp.
3.3%
HCA Healthcare, Inc.
3.2%
Broadcom, Inc.
3.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000082270  
Shareholder Report [Line Items]  
Fund Name Multi-Cap Opportunities Fund
Class Name Class A
Trading Symbol NMUAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/MultiCapOpportunities/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/MultiCapOpportunities/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class A
$64
1.26%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 64
Expense Ratio, Percent 1.26%
AssetsNet $ 251,489,341
Holdings Count | Holding 47
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$251,489,341
Number of Portfolio Holdings
47
Portfolio Turnover Rate
17%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
21.8%
Financials
21.8%
Consumer Discretionary
14.2%
Industrials
12.6%
Communication Services
8.4%
Health Care
6.6%
Consumer Staples
5.7%
Utilities
3.7%
Materials
3.5%
Energy
1.3%
Short-Term Investments
0.4%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Alphabet, Inc. Class C
5.4%
Apple, Inc.
4.5%
NVIDIA Corp.
4.5%
Microsoft Corp.
3.9%
Brookfield Corp.
3.8%
Berkshire Hathaway, Inc. Class B
3.7%
Amazon.com, Inc.
3.6%
U.S. Foods Holding Corp.
3.3%
HCA Healthcare, Inc.
3.2%
Broadcom, Inc.
3.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000082271  
Shareholder Report [Line Items]  
Fund Name Multi-Cap Opportunities Fund
Class Name Class C
Trading Symbol NMUCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/MultiCapOpportunities/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/MultiCapOpportunities/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class C
$102
2.01%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 102
Expense Ratio, Percent 2.01%
AssetsNet $ 251,489,341
Holdings Count | Holding 47
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$251,489,341
Number of Portfolio Holdings
47
Portfolio Turnover Rate
17%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
21.8%
Financials
21.8%
Consumer Discretionary
14.2%
Industrials
12.6%
Communication Services
8.4%
Health Care
6.6%
Consumer Staples
5.7%
Utilities
3.7%
Materials
3.5%
Energy
1.3%
Short-Term Investments
0.4%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Alphabet, Inc. Class C
5.4%
Apple, Inc.
4.5%
NVIDIA Corp.
4.5%
Microsoft Corp.
3.9%
Brookfield Corp.
3.8%
Berkshire Hathaway, Inc. Class B
3.7%
Amazon.com, Inc.
3.6%
U.S. Foods Holding Corp.
3.3%
HCA Healthcare, Inc.
3.2%
Broadcom, Inc.
3.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000228874  
Shareholder Report [Line Items]  
Fund Name Multi-Cap Opportunities Fund
Class Name Class E
Trading Symbol NMUEX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/MultiCapOpportunities/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/MultiCapOpportunities/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class E
$7
0.13%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 7
Expense Ratio, Percent 0.13%
AssetsNet $ 251,489,341
Holdings Count | Holding 47
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$251,489,341
Number of Portfolio Holdings
47
Portfolio Turnover Rate
17%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
21.8%
Financials
21.8%
Consumer Discretionary
14.2%
Industrials
12.6%
Communication Services
8.4%
Health Care
6.6%
Consumer Staples
5.7%
Utilities
3.7%
Materials
3.5%
Energy
1.3%
Short-Term Investments
0.4%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Alphabet, Inc. Class C
5.4%
Apple, Inc.
4.5%
NVIDIA Corp.
4.5%
Microsoft Corp.
3.9%
Brookfield Corp.
3.8%
Berkshire Hathaway, Inc. Class B
3.7%
Amazon.com, Inc.
3.6%
U.S. Foods Holding Corp.
3.3%
HCA Healthcare, Inc.
3.2%
Broadcom, Inc.
3.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000021349  
Shareholder Report [Line Items]  
Fund Name Quality Equity Fund
Class Name Investor Class
Trading Symbol NBSRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/QualityEquity/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/QualityEquity/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Investor Class
$43
0.83%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 43
Expense Ratio, Percent 0.83%
AssetsNet $ 2,575,211,086
Holdings Count | Holding 44
InvestmentCompanyPortfolioTurnover 7.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$2,575,211,086
Number of Portfolio Holdings
44
Portfolio Turnover Rate
7%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
27.0%
Financials
19.8%
Industrials
16.5%
Consumer Discretionary
12.3%
Communication Services
10.4%
Health Care
10.0%
Energy
1.2%
Consumer Staples
1.2%
Materials
0.4%
Short-Term Investments
1.2%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Alphabet, Inc. Class A
10.3%
Amazon.com, Inc.
8.4%
Microsoft Corp.
6.1%
Taiwan Semiconductor Manufacturing Co. Ltd.
5.1%
Interactive Brokers Group, Inc. Class A
4.7%
Space Exploration Technologies Corp., Series E
4.4%
Applied Materials, Inc.
4.2%
NVIDIA Corp.
4.1%
Berkshire Hathaway, Inc. Class B
3.3%
Berkshire Hathaway, Inc. Class A
3.2%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000021350  
Shareholder Report [Line Items]  
Fund Name Quality Equity Fund
Class Name Trust Class
Trading Symbol NBSTX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/QualityEquity/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/QualityEquity/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Trust Class
$53
1.02%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 53
Expense Ratio, Percent 1.02%
AssetsNet $ 2,575,211,086
Holdings Count | Holding 44
InvestmentCompanyPortfolioTurnover 7.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$2,575,211,086
Number of Portfolio Holdings
44
Portfolio Turnover Rate
7%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
27.0%
Financials
19.8%
Industrials
16.5%
Consumer Discretionary
12.3%
Communication Services
10.4%
Health Care
10.0%
Energy
1.2%
Consumer Staples
1.2%
Materials
0.4%
Short-Term Investments
1.2%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Alphabet, Inc. Class A
10.3%
Amazon.com, Inc.
8.4%
Microsoft Corp.
6.1%
Taiwan Semiconductor Manufacturing Co. Ltd.
5.1%
Interactive Brokers Group, Inc. Class A
4.7%
Space Exploration Technologies Corp., Series E
4.4%
Applied Materials, Inc.
4.2%
NVIDIA Corp.
4.1%
Berkshire Hathaway, Inc. Class B
3.3%
Berkshire Hathaway, Inc. Class A
3.2%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000027738  
Shareholder Report [Line Items]  
Fund Name Quality Equity Fund
Class Name Institutional Class
Trading Symbol NBSLX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/QualityEquity/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/QualityEquity/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Institutional Class
$34
0.66%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 34
Expense Ratio, Percent 0.66%
AssetsNet $ 2,575,211,086
Holdings Count | Holding 44
InvestmentCompanyPortfolioTurnover 7.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$2,575,211,086
Number of Portfolio Holdings
44
Portfolio Turnover Rate
7%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
27.0%
Financials
19.8%
Industrials
16.5%
Consumer Discretionary
12.3%
Communication Services
10.4%
Health Care
10.0%
Energy
1.2%
Consumer Staples
1.2%
Materials
0.4%
Short-Term Investments
1.2%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Alphabet, Inc. Class A
10.3%
Amazon.com, Inc.
8.4%
Microsoft Corp.
6.1%
Taiwan Semiconductor Manufacturing Co. Ltd.
5.1%
Interactive Brokers Group, Inc. Class A
4.7%
Space Exploration Technologies Corp., Series E
4.4%
Applied Materials, Inc.
4.2%
NVIDIA Corp.
4.1%
Berkshire Hathaway, Inc. Class B
3.3%
Berkshire Hathaway, Inc. Class A
3.2%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000077156  
Shareholder Report [Line Items]  
Fund Name Quality Equity Fund
Class Name Class A
Trading Symbol NRAAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/QualityEquity/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/QualityEquity/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class A
$54
1.03%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 54
Expense Ratio, Percent 1.03%
AssetsNet $ 2,575,211,086
Holdings Count | Holding 44
InvestmentCompanyPortfolioTurnover 7.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$2,575,211,086
Number of Portfolio Holdings
44
Portfolio Turnover Rate
7%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
27.0%
Financials
19.8%
Industrials
16.5%
Consumer Discretionary
12.3%
Communication Services
10.4%
Health Care
10.0%
Energy
1.2%
Consumer Staples
1.2%
Materials
0.4%
Short-Term Investments
1.2%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Alphabet, Inc. Class A
10.3%
Amazon.com, Inc.
8.4%
Microsoft Corp.
6.1%
Taiwan Semiconductor Manufacturing Co. Ltd.
5.1%
Interactive Brokers Group, Inc. Class A
4.7%
Space Exploration Technologies Corp., Series E
4.4%
Applied Materials, Inc.
4.2%
NVIDIA Corp.
4.1%
Berkshire Hathaway, Inc. Class B
3.3%
Berkshire Hathaway, Inc. Class A
3.2%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000077153  
Shareholder Report [Line Items]  
Fund Name Quality Equity Fund
Class Name Class C
Trading Symbol NRACX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/QualityEquity/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/QualityEquity/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class C
$92
1.78%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 92
Expense Ratio, Percent 1.78%
AssetsNet $ 2,575,211,086
Holdings Count | Holding 44
InvestmentCompanyPortfolioTurnover 7.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$2,575,211,086
Number of Portfolio Holdings
44
Portfolio Turnover Rate
7%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
27.0%
Financials
19.8%
Industrials
16.5%
Consumer Discretionary
12.3%
Communication Services
10.4%
Health Care
10.0%
Energy
1.2%
Consumer Staples
1.2%
Materials
0.4%
Short-Term Investments
1.2%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Alphabet, Inc. Class A
10.3%
Amazon.com, Inc.
8.4%
Microsoft Corp.
6.1%
Taiwan Semiconductor Manufacturing Co. Ltd.
5.1%
Interactive Brokers Group, Inc. Class A
4.7%
Space Exploration Technologies Corp., Series E
4.4%
Applied Materials, Inc.
4.2%
NVIDIA Corp.
4.1%
Berkshire Hathaway, Inc. Class B
3.3%
Berkshire Hathaway, Inc. Class A
3.2%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000077155  
Shareholder Report [Line Items]  
Fund Name Quality Equity Fund
Class Name Class R3
Trading Symbol NRARX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/QualityEquity/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/QualityEquity/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class R3
$67
1.28%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 67
Expense Ratio, Percent 1.28%
AssetsNet $ 2,575,211,086
Holdings Count | Holding 44
InvestmentCompanyPortfolioTurnover 7.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$2,575,211,086
Number of Portfolio Holdings
44
Portfolio Turnover Rate
7%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
27.0%
Financials
19.8%
Industrials
16.5%
Consumer Discretionary
12.3%
Communication Services
10.4%
Health Care
10.0%
Energy
1.2%
Consumer Staples
1.2%
Materials
0.4%
Short-Term Investments
1.2%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Alphabet, Inc. Class A
10.3%
Amazon.com, Inc.
8.4%
Microsoft Corp.
6.1%
Taiwan Semiconductor Manufacturing Co. Ltd.
5.1%
Interactive Brokers Group, Inc. Class A
4.7%
Space Exploration Technologies Corp., Series E
4.4%
Applied Materials, Inc.
4.2%
NVIDIA Corp.
4.1%
Berkshire Hathaway, Inc. Class B
3.3%
Berkshire Hathaway, Inc. Class A
3.2%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000125072  
Shareholder Report [Line Items]  
Fund Name Quality Equity Fund
Class Name Class R6
Trading Symbol NRSRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/QualityEquity/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/QualityEquity/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class R6
$30
0.57%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 30
Expense Ratio, Percent 0.57%
AssetsNet $ 2,575,211,086
Holdings Count | Holding 44
InvestmentCompanyPortfolioTurnover 7.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$2,575,211,086
Number of Portfolio Holdings
44
Portfolio Turnover Rate
7%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
27.0%
Financials
19.8%
Industrials
16.5%
Consumer Discretionary
12.3%
Communication Services
10.4%
Health Care
10.0%
Energy
1.2%
Consumer Staples
1.2%
Materials
0.4%
Short-Term Investments
1.2%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Alphabet, Inc. Class A
10.3%
Amazon.com, Inc.
8.4%
Microsoft Corp.
6.1%
Taiwan Semiconductor Manufacturing Co. Ltd.
5.1%
Interactive Brokers Group, Inc. Class A
4.7%
Space Exploration Technologies Corp., Series E
4.4%
Applied Materials, Inc.
4.2%
NVIDIA Corp.
4.1%
Berkshire Hathaway, Inc. Class B
3.3%
Berkshire Hathaway, Inc. Class A
3.2%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000244622  
Shareholder Report [Line Items]  
Fund Name Quality Equity Fund
Class Name Class E
Trading Symbol NRAEX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/QualityEquity/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/QualityEquity/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class E
$2
0.04%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 2
Expense Ratio, Percent 0.04%
AssetsNet $ 2,575,211,086
Holdings Count | Holding 44
InvestmentCompanyPortfolioTurnover 7.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$2,575,211,086
Number of Portfolio Holdings
44
Portfolio Turnover Rate
7%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Information Technology
27.0%
Financials
19.8%
Industrials
16.5%
Consumer Discretionary
12.3%
Communication Services
10.4%
Health Care
10.0%
Energy
1.2%
Consumer Staples
1.2%
Materials
0.4%
Short-Term Investments
1.2%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Alphabet, Inc. Class A
10.3%
Amazon.com, Inc.
8.4%
Microsoft Corp.
6.1%
Taiwan Semiconductor Manufacturing Co. Ltd.
5.1%
Interactive Brokers Group, Inc. Class A
4.7%
Space Exploration Technologies Corp., Series E
4.4%
Applied Materials, Inc.
4.2%
NVIDIA Corp.
4.1%
Berkshire Hathaway, Inc. Class B
3.3%
Berkshire Hathaway, Inc. Class A
3.2%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000021342  
Shareholder Report [Line Items]  
Fund Name Real Estate Fund
Class Name Trust Class
Trading Symbol NBRFX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/RealEstate/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/RealEstate/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Trust Class
$53
1.04%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 53
Expense Ratio, Percent 1.04%
AssetsNet $ 672,221,347
Holdings Count | Holding 36
InvestmentCompanyPortfolioTurnover 19.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$672,221,347
Number of Portfolio Holdings
36
Portfolio Turnover Rate
19%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Health Care
18.2%
Telecommunications
13.2%
Data Centers
13.1%
Industrial
9.6%
Apartments
8.8%
Free Standing
7.2%
Self Storage
6.2%
Regional Malls
5.4%
Shopping Centers
4.1%
Manufactured Homes
3.6%
Single Family Homes
2.9%
Specialty
2.9%
Office
2.0%
Gaming
1.4%
Short-Term Investments
1.4%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Welltower, Inc.
9.4%
Equinix, Inc.
8.7%
Prologis, Inc.
8.5%
American Tower Corp.
7.4%
Digital Realty Trust, Inc.
4.5%
Ventas, Inc.
4.3%
Simon Property Group, Inc.
4.0%
AvalonBay Communities, Inc.
4.0%
Public Storage
3.6%
SBA Communications Corp.
3.2%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000021341  
Shareholder Report [Line Items]  
Fund Name Real Estate Fund
Class Name Institutional Class
Trading Symbol NBRIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/RealEstate/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/RealEstate/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Institutional Class
$44
0.85%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 44
Expense Ratio, Percent 0.85%
AssetsNet $ 672,221,347
Holdings Count | Holding 36
InvestmentCompanyPortfolioTurnover 19.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$672,221,347
Number of Portfolio Holdings
36
Portfolio Turnover Rate
19%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Health Care
18.2%
Telecommunications
13.2%
Data Centers
13.1%
Industrial
9.6%
Apartments
8.8%
Free Standing
7.2%
Self Storage
6.2%
Regional Malls
5.4%
Shopping Centers
4.1%
Manufactured Homes
3.6%
Single Family Homes
2.9%
Specialty
2.9%
Office
2.0%
Gaming
1.4%
Short-Term Investments
1.4%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Welltower, Inc.
9.4%
Equinix, Inc.
8.7%
Prologis, Inc.
8.5%
American Tower Corp.
7.4%
Digital Realty Trust, Inc.
4.5%
Ventas, Inc.
4.3%
Simon Property Group, Inc.
4.0%
AvalonBay Communities, Inc.
4.0%
Public Storage
3.6%
SBA Communications Corp.
3.2%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000090002  
Shareholder Report [Line Items]  
Fund Name Real Estate Fund
Class Name Class A
Trading Symbol NREAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/RealEstate/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/RealEstate/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class A
$62
1.21%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 62
Expense Ratio, Percent 1.21%
AssetsNet $ 672,221,347
Holdings Count | Holding 36
InvestmentCompanyPortfolioTurnover 19.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$672,221,347
Number of Portfolio Holdings
36
Portfolio Turnover Rate
19%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Health Care
18.2%
Telecommunications
13.2%
Data Centers
13.1%
Industrial
9.6%
Apartments
8.8%
Free Standing
7.2%
Self Storage
6.2%
Regional Malls
5.4%
Shopping Centers
4.1%
Manufactured Homes
3.6%
Single Family Homes
2.9%
Specialty
2.9%
Office
2.0%
Gaming
1.4%
Short-Term Investments
1.4%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Welltower, Inc.
9.4%
Equinix, Inc.
8.7%
Prologis, Inc.
8.5%
American Tower Corp.
7.4%
Digital Realty Trust, Inc.
4.5%
Ventas, Inc.
4.3%
Simon Property Group, Inc.
4.0%
AvalonBay Communities, Inc.
4.0%
Public Storage
3.6%
SBA Communications Corp.
3.2%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000090003  
Shareholder Report [Line Items]  
Fund Name Real Estate Fund
Class Name Class C
Trading Symbol NRECX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/RealEstate/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/RealEstate/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class C
$100
1.96%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 100
Expense Ratio, Percent 1.96%
AssetsNet $ 672,221,347
Holdings Count | Holding 36
InvestmentCompanyPortfolioTurnover 19.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$672,221,347
Number of Portfolio Holdings
36
Portfolio Turnover Rate
19%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Health Care
18.2%
Telecommunications
13.2%
Data Centers
13.1%
Industrial
9.6%
Apartments
8.8%
Free Standing
7.2%
Self Storage
6.2%
Regional Malls
5.4%
Shopping Centers
4.1%
Manufactured Homes
3.6%
Single Family Homes
2.9%
Specialty
2.9%
Office
2.0%
Gaming
1.4%
Short-Term Investments
1.4%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Welltower, Inc.
9.4%
Equinix, Inc.
8.7%
Prologis, Inc.
8.5%
American Tower Corp.
7.4%
Digital Realty Trust, Inc.
4.5%
Ventas, Inc.
4.3%
Simon Property Group, Inc.
4.0%
AvalonBay Communities, Inc.
4.0%
Public Storage
3.6%
SBA Communications Corp.
3.2%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000090004  
Shareholder Report [Line Items]  
Fund Name Real Estate Fund
Class Name Class R3
Trading Symbol NRERX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/RealEstate/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/RealEstate/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class R3
$75
1.46%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 75
Expense Ratio, Percent 1.46%
AssetsNet $ 672,221,347
Holdings Count | Holding 36
InvestmentCompanyPortfolioTurnover 19.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$672,221,347
Number of Portfolio Holdings
36
Portfolio Turnover Rate
19%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Health Care
18.2%
Telecommunications
13.2%
Data Centers
13.1%
Industrial
9.6%
Apartments
8.8%
Free Standing
7.2%
Self Storage
6.2%
Regional Malls
5.4%
Shopping Centers
4.1%
Manufactured Homes
3.6%
Single Family Homes
2.9%
Specialty
2.9%
Office
2.0%
Gaming
1.4%
Short-Term Investments
1.4%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Welltower, Inc.
9.4%
Equinix, Inc.
8.7%
Prologis, Inc.
8.5%
American Tower Corp.
7.4%
Digital Realty Trust, Inc.
4.5%
Ventas, Inc.
4.3%
Simon Property Group, Inc.
4.0%
AvalonBay Communities, Inc.
4.0%
Public Storage
3.6%
SBA Communications Corp.
3.2%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000125071  
Shareholder Report [Line Items]  
Fund Name Real Estate Fund
Class Name Class R6
Trading Symbol NRREX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/RealEstate/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/RealEstate/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class R6
$39
0.75%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 39
Expense Ratio, Percent 0.75%
AssetsNet $ 672,221,347
Holdings Count | Holding 36
InvestmentCompanyPortfolioTurnover 19.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$672,221,347
Number of Portfolio Holdings
36
Portfolio Turnover Rate
19%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Health Care
18.2%
Telecommunications
13.2%
Data Centers
13.1%
Industrial
9.6%
Apartments
8.8%
Free Standing
7.2%
Self Storage
6.2%
Regional Malls
5.4%
Shopping Centers
4.1%
Manufactured Homes
3.6%
Single Family Homes
2.9%
Specialty
2.9%
Office
2.0%
Gaming
1.4%
Short-Term Investments
1.4%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Welltower, Inc.
9.4%
Equinix, Inc.
8.7%
Prologis, Inc.
8.5%
American Tower Corp.
7.4%
Digital Realty Trust, Inc.
4.5%
Ventas, Inc.
4.3%
Simon Property Group, Inc.
4.0%
AvalonBay Communities, Inc.
4.0%
Public Storage
3.6%
SBA Communications Corp.
3.2%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000228872  
Shareholder Report [Line Items]  
Fund Name Real Estate Fund
Class Name Class E
Trading Symbol NREEX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/RealEstate/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/RealEstate/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class E
$5
0.09%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 5
Expense Ratio, Percent 0.09%
AssetsNet $ 672,221,347
Holdings Count | Holding 36
InvestmentCompanyPortfolioTurnover 19.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$672,221,347
Number of Portfolio Holdings
36
Portfolio Turnover Rate
19%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Health Care
18.2%
Telecommunications
13.2%
Data Centers
13.1%
Industrial
9.6%
Apartments
8.8%
Free Standing
7.2%
Self Storage
6.2%
Regional Malls
5.4%
Shopping Centers
4.1%
Manufactured Homes
3.6%
Single Family Homes
2.9%
Specialty
2.9%
Office
2.0%
Gaming
1.4%
Short-Term Investments
1.4%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Welltower, Inc.
9.4%
Equinix, Inc.
8.7%
Prologis, Inc.
8.5%
American Tower Corp.
7.4%
Digital Realty Trust, Inc.
4.5%
Ventas, Inc.
4.3%
Simon Property Group, Inc.
4.0%
AvalonBay Communities, Inc.
4.0%
Public Storage
3.6%
SBA Communications Corp.
3.2%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000021330  
Shareholder Report [Line Items]  
Fund Name Small Cap Growth Fund
Class Name Investor Class
Trading Symbol NBMIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/SmallCapGrowth/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/SmallCapGrowth/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Investor Class
$53
1.01%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 53
Expense Ratio, Percent 1.01%
AssetsNet $ 480,173,225
Holdings Count | Holding 95
InvestmentCompanyPortfolioTurnover 104.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$480,173,225
Number of Portfolio Holdings
95
Portfolio Turnover Rate
104%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
26.7%
Health Care
24.1%
Information Technology
19.7%
Financials
8.6%
Consumer Discretionary
8.5%
Energy
5.5%
Materials
2.2%
Consumer Staples
2.0%
Utilities
0.6%
Short-Term Investments
2.1%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Rambus, Inc.
2.8%
FirstCash Holdings, Inc.
2.6%
Piper Sandler Cos.
2.5%
InterDigital, Inc.
2.3%
RadNet, Inc.
2.2%
State Street Navigator Securities Lending Government Money Market Portfolio
2.1%
Dave, Inc.
2.0%
Bloom Energy Corp. Class A
1.9%
Zurn Elkay Water Solutions Corp.
1.9%
Mirion Technologies, Inc.
1.9%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000021331  
Shareholder Report [Line Items]  
Fund Name Small Cap Growth Fund
Class Name Trust Class
Trading Symbol NBMOX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/SmallCapGrowth/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/SmallCapGrowth/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Trust Class
$66
1.25%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 66
Expense Ratio, Percent 1.25%
AssetsNet $ 480,173,225
Holdings Count | Holding 95
InvestmentCompanyPortfolioTurnover 104.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$480,173,225
Number of Portfolio Holdings
95
Portfolio Turnover Rate
104%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
26.7%
Health Care
24.1%
Information Technology
19.7%
Financials
8.6%
Consumer Discretionary
8.5%
Energy
5.5%
Materials
2.2%
Consumer Staples
2.0%
Utilities
0.6%
Short-Term Investments
2.1%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Rambus, Inc.
2.8%
FirstCash Holdings, Inc.
2.6%
Piper Sandler Cos.
2.5%
InterDigital, Inc.
2.3%
RadNet, Inc.
2.2%
State Street Navigator Securities Lending Government Money Market Portfolio
2.1%
Dave, Inc.
2.0%
Bloom Energy Corp. Class A
1.9%
Zurn Elkay Water Solutions Corp.
1.9%
Mirion Technologies, Inc.
1.9%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000021332  
Shareholder Report [Line Items]  
Fund Name Small Cap Growth Fund
Class Name Advisor Class
Trading Symbol NBMVX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/SmallCapGrowth/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/SmallCapGrowth/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Advisor Class
$73
1.40%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 73
Expense Ratio, Percent 1.40%
AssetsNet $ 480,173,225
Holdings Count | Holding 95
InvestmentCompanyPortfolioTurnover 104.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$480,173,225
Number of Portfolio Holdings
95
Portfolio Turnover Rate
104%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
26.7%
Health Care
24.1%
Information Technology
19.7%
Financials
8.6%
Consumer Discretionary
8.5%
Energy
5.5%
Materials
2.2%
Consumer Staples
2.0%
Utilities
0.6%
Short-Term Investments
2.1%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Rambus, Inc.
2.8%
FirstCash Holdings, Inc.
2.6%
Piper Sandler Cos.
2.5%
InterDigital, Inc.
2.3%
RadNet, Inc.
2.2%
State Street Navigator Securities Lending Government Money Market Portfolio
2.1%
Dave, Inc.
2.0%
Bloom Energy Corp. Class A
1.9%
Zurn Elkay Water Solutions Corp.
1.9%
Mirion Technologies, Inc.
1.9%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000027734  
Shareholder Report [Line Items]  
Fund Name Small Cap Growth Fund
Class Name Institutional Class
Trading Symbol NBSMX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/SmallCapGrowth/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/SmallCapGrowth/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Institutional Class
$47
0.90%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 47
Expense Ratio, Percent 0.90%
AssetsNet $ 480,173,225
Holdings Count | Holding 95
InvestmentCompanyPortfolioTurnover 104.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$480,173,225
Number of Portfolio Holdings
95
Portfolio Turnover Rate
104%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
26.7%
Health Care
24.1%
Information Technology
19.7%
Financials
8.6%
Consumer Discretionary
8.5%
Energy
5.5%
Materials
2.2%
Consumer Staples
2.0%
Utilities
0.6%
Short-Term Investments
2.1%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Rambus, Inc.
2.8%
FirstCash Holdings, Inc.
2.6%
Piper Sandler Cos.
2.5%
InterDigital, Inc.
2.3%
RadNet, Inc.
2.2%
State Street Navigator Securities Lending Government Money Market Portfolio
2.1%
Dave, Inc.
2.0%
Bloom Energy Corp. Class A
1.9%
Zurn Elkay Water Solutions Corp.
1.9%
Mirion Technologies, Inc.
1.9%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000077149  
Shareholder Report [Line Items]  
Fund Name Small Cap Growth Fund
Class Name Class A
Trading Symbol NSNAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/SmallCapGrowth/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/SmallCapGrowth/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class A
$66
1.26%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 66
Expense Ratio, Percent 1.26%
AssetsNet $ 480,173,225
Holdings Count | Holding 95
InvestmentCompanyPortfolioTurnover 104.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$480,173,225
Number of Portfolio Holdings
95
Portfolio Turnover Rate
104%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
26.7%
Health Care
24.1%
Information Technology
19.7%
Financials
8.6%
Consumer Discretionary
8.5%
Energy
5.5%
Materials
2.2%
Consumer Staples
2.0%
Utilities
0.6%
Short-Term Investments
2.1%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Rambus, Inc.
2.8%
FirstCash Holdings, Inc.
2.6%
Piper Sandler Cos.
2.5%
InterDigital, Inc.
2.3%
RadNet, Inc.
2.2%
State Street Navigator Securities Lending Government Money Market Portfolio
2.1%
Dave, Inc.
2.0%
Bloom Energy Corp. Class A
1.9%
Zurn Elkay Water Solutions Corp.
1.9%
Mirion Technologies, Inc.
1.9%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000077150  
Shareholder Report [Line Items]  
Fund Name Small Cap Growth Fund
Class Name Class C
Trading Symbol NSNCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/SmallCapGrowth/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.877.9700 or fundinfo@nb.com.
Additional Information Phone Number 800.877.9700
Additional Information Email fundinfo@nb.com
Additional Information Website https://www.nb.com/SmallCapGrowth/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class C
$105
2.01%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 105
Expense Ratio, Percent 2.01%
AssetsNet $ 480,173,225
Holdings Count | Holding 95
InvestmentCompanyPortfolioTurnover 104.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$480,173,225
Number of Portfolio Holdings
95
Portfolio Turnover Rate
104%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
26.7%
Health Care
24.1%
Information Technology
19.7%
Financials
8.6%
Consumer Discretionary
8.5%
Energy
5.5%
Materials
2.2%
Consumer Staples
2.0%
Utilities
0.6%
Short-Term Investments
2.1%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Rambus, Inc.
2.8%
FirstCash Holdings, Inc.
2.6%
Piper Sandler Cos.
2.5%
InterDigital, Inc.
2.3%
RadNet, Inc.
2.2%
State Street Navigator Securities Lending Government Money Market Portfolio
2.1%
Dave, Inc.
2.0%
Bloom Energy Corp. Class A
1.9%
Zurn Elkay Water Solutions Corp.
1.9%
Mirion Technologies, Inc.
1.9%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000077152  
Shareholder Report [Line Items]  
Fund Name Small Cap Growth Fund
Class Name Class R3
Trading Symbol NSNRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/SmallCapGrowth/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/SmallCapGrowth/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class R3
$79
1.51%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 79
Expense Ratio, Percent 1.51%
AssetsNet $ 480,173,225
Holdings Count | Holding 95
InvestmentCompanyPortfolioTurnover 104.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$480,173,225
Number of Portfolio Holdings
95
Portfolio Turnover Rate
104%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
26.7%
Health Care
24.1%
Information Technology
19.7%
Financials
8.6%
Consumer Discretionary
8.5%
Energy
5.5%
Materials
2.2%
Consumer Staples
2.0%
Utilities
0.6%
Short-Term Investments
2.1%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Rambus, Inc.
2.8%
FirstCash Holdings, Inc.
2.6%
Piper Sandler Cos.
2.5%
InterDigital, Inc.
2.3%
RadNet, Inc.
2.2%
State Street Navigator Securities Lending Government Money Market Portfolio
2.1%
Dave, Inc.
2.0%
Bloom Energy Corp. Class A
1.9%
Zurn Elkay Water Solutions Corp.
1.9%
Mirion Technologies, Inc.
1.9%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
C000205810  
Shareholder Report [Line Items]  
Fund Name Small Cap Growth Fund
Class Name Class R6
Trading Symbol NSRSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Fund for the period of September 1, 2025 to February 28, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.nb.com/SmallCapGrowth/TSRdocuments. You can also request this information by contacting your financial intermediary or investment provider or at 800.366.6264 or issdl@nb.com.
Additional Information Phone Number 800.366.6264
Additional Information Email issdl@nb.com
Additional Information Website https://www.nb.com/SmallCapGrowth/TSRdocuments
Expenses [Text Block]

What were the Fund's costs for the past six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Class R6
$42
0.80%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 42
Expense Ratio, Percent 0.80%
AssetsNet $ 480,173,225
Holdings Count | Holding 95
InvestmentCompanyPortfolioTurnover 104.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Net Assets
$480,173,225
Number of Portfolio Holdings
95
Portfolio Turnover Rate
104%
Holdings [Text Block]

Sector Allocation

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Industrials
26.7%
Health Care
24.1%
Information Technology
19.7%
Financials
8.6%
Consumer Discretionary
8.5%
Energy
5.5%
Materials
2.2%
Consumer Staples
2.0%
Utilities
0.6%
Short-Term Investments
2.1%
Total
100.0%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.
Largest Holdings [Text Block]

Top Ten Securities

(as a % of Total InvestmentsFootnote Reference*)

Table Summary
Rambus, Inc.
2.8%
FirstCash Holdings, Inc.
2.6%
Piper Sandler Cos.
2.5%
InterDigital, Inc.
2.3%
RadNet, Inc.
2.2%
State Street Navigator Securities Lending Government Money Market Portfolio
2.1%
Dave, Inc.
2.0%
Bloom Energy Corp. Class A
1.9%
Zurn Elkay Water Solutions Corp.
1.9%
Mirion Technologies, Inc.
1.9%
FootnoteDescription
Footnote*
Derivatives (other than options purchased), if any, are excluded from this calculation.