| Form N-CSR Cover | 6 Months Ended |
| Jun. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | LKCM Funds |
| Entity Central Index Key | 0000918942 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jun. 30, 2024 |
| Shareholder Report | 6 Months Ended |
| Jun. 30, 2024 USD ($) $ / shares | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | LKCM Funds |
| Entity Central Index Key | 0000918942 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jun. 30, 2024 |
| LKCM Small Cap Equity Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | LKCM Small Cap Equity Fund |
| Class Name | LKCM Small Cap Equity Fund |
| Trading Symbol | LKSCX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the LKCM Small Cap Equity Fund for the period of January 1, 2024, to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.lkcmfunds.com/literature . You can also request this information by contacting us at 1-800-688-LKCM. |
| Additional Information Phone Number | 1-800-688-LKCM. |
| Additional Information Website | https://www.lkcmfunds.com/literature |
| Expenses [Text Block] | WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment) Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment LKCM Small Cap Equity Fund $51 1.00% |
| Expenses Paid, Amount | $ 51 |
| Expense Ratio, Percent | 1% |
| Updated Performance Information Location [Text Block] | Visit https://www.lkcmfunds.com/lkcmfund/lkcm-small-cap-equity-fund/ for recent performance information. |
| Net Assets | $ 263,034,721 |
| Holdings Count | $ / shares | 79 |
| Investment Company Portfolio Turnover | 16% |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of June 30, 2024) Net Assets $263,034,721 Number of Holdings 79 Portfolio Turnover 16% |
| Holdings [Text Block] | Top Sectors (% of Net Assets) Industrials 19.6% Financials 15.2% Information Technology 13.1% Consumer Discretionary 10.5% Health Care 10.2% Cash & Other 9.9% Energy 7.0% Materials 5.8% Consumer Staples 4.9% Communication Services 2.7% Real Estate 1.1% Top 10 Issuers (% of Net Assets) BellRing Brands, Inc. 2.2% Medpace Holdings, Inc. 2.1% CSW Industrials, Inc. 2.1% Q2 Holdings, Inc. 1.9% ESAB Corp. 1.9% Altair Engineering, Inc. - Class A 1.9% Primo Water Corp. 1.8% Palomar Holdings Inc. 1.7% Crocs Inc. 1.7% Hawkins Inc. 1.7% |
| Updated Prospectus Web Address | https://www.lkcmfunds.com/literature |
| LKCM Small-Mid Cap Equity Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | LKCM Small-Mid Cap Equity Fund |
| Class Name | LKCM Small-Mid Cap Equity Fund |
| Trading Symbol | LKSMX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the LKCM Small-Mid Cap Equity Fund for the period of January 1, 2024, to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.lkcmfunds.com/literature . You can also request this information by contacting us at 1-800-688-LKCM. |
| Additional Information Phone Number | 1-800-688-LKCM |
| Additional Information Website | https://www.lkcmfunds.com/literature |
| Expenses [Text Block] | WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment) Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment LKCM Small-Mid Cap Equity Fund $50 1.00% |
| Expenses Paid, Amount | $ 50 |
| Expense Ratio, Percent | 1% |
| Updated Performance Information Location [Text Block] | Visit https://www.lkcmfunds.com/lkcmfund/lkcm-small-mid-cap-equity-fund/ for recent performance information. |
| Net Assets | $ 32,900,605 |
| Holdings Count | $ / shares | 56 |
| Investment Company Portfolio Turnover | 20% |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of June 30, 2024) Net Assets $32,900,605 Number of Holdings 56 Portfolio Turnover 20% |
| Holdings [Text Block] | Top Sectors (% of Net Assets) Industrials 24.8% Financials 16.1% Information Technology 14.4% Consumer Discretionary 10.1% Health Care 9.1% Energy 6.4% Real Estate 5.1% Cash & Other 4.8% Materials 4.7% Consumer Staples 3.1% Communication Services 1.4% Top 10 Issuers (% of Net Assets) Q2 Holdings, Inc. 3.4% Enovis Corp. 3.1% Murphy USA, Inc. 2.5% Palomar Holdings, Inc. 2.4% Tower Semiconductor Ltd. 2.3% Altair Engineering, Inc. - Class A 2.2% Permian Resources Corp. 2.2% CSW Industrials, Inc. 2.2% Ensign Group, Inc. 2.2% Natera Inc. 2.1% |
| Updated Prospectus Web Address | https://www.lkcmfunds.com/literature |
| LKCM Equity Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | LKCM Equity Fund |
| Class Name | LKCM Equity Fund |
| Trading Symbol | LKEQX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the LKCM Equity Fund for the period of January 1, 2024, to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.lkcmfunds.com/literature . You can also request this information by contacting us at 1-800-688-LKCM. |
| Additional Information Phone Number | 1-800-688-LKCM. |
| Additional Information Website | https://www.lkcmfunds.com/literature |
| Expenses [Text Block] | WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment) Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment LKCM Equity Fund $42 0.80% |
| Expenses Paid, Amount | $ 42 |
| Expense Ratio, Percent | 0.80% |
| Updated Performance Information Location [Text Block] | Visit https://www.lkcmfunds.com/lkcmfund/lkcm-equity-fund/ for recent performance information. |
| Net Assets | $ 519,551,583 |
| Holdings Count | $ / shares | 56 |
| Investment Company Portfolio Turnover | 7% |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of June 30, 2024) Net Assets $519,551,583 Number of Holdings 56 Portfolio Turnover 7% |
| Holdings [Text Block] | Top Sectors (% of Net Assets) Information Technology 26.7% Industrials 22.5% Health Care 13.3% Materials 6.9% Energy 6.8% Consumer Discretionary 6.3% Financials 5.8% Consumer Staples 5.5% Communication Services 3.9% Cash & Other 2.3% Top 10 Issuers (% of Net Assets) Microsoft Corp. 8.4% Apple Inc. 3.9% Alphabet, Inc. - Class A 3.8% NVIDIA Corp. 3.6% Oracle Corp. 3.3% Waste Connections, Inc. 3.0% JPMorgan Chase & Co. 2.6% FTAI Aviation Ltd. 2.6% Ecolab, Inc. 2.5% ConocoPhillips 2.2% |
| Updated Prospectus Web Address | https://www.lkcmfunds.com/literature |
| LKCM Balanced Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | LKCM Balanced Fund |
| Class Name | LKCM Balanced Fund |
| Trading Symbol | LKBAX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the LKCM Balanced Fund for the period of January 1, 2024, to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.lkcmfunds.com/literature . You can also request this information by contacting us at 1-800-688-LKCM. |
| Additional Information Phone Number | 1-800-688-LKCM |
| Additional Information Website | https://www.lkcmfunds.com/literature |
| Expenses [Text Block] | WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment) Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment LKCM Balanced Fund $41 0.80% |
| Expenses Paid, Amount | $ 41 |
| Expense Ratio, Percent | 0.80% |
| Updated Performance Information Location [Text Block] | Visit https://www.lkcmfunds.com/lkcmfund/lkcm-balanced-fund/ for recent performance information. |
| Net Assets | $ 116,023,005 |
| Holdings Count | $ / shares | 140 |
| Investment Company Portfolio Turnover | 7% |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of June 30, 2024) Net Assets $116,023,005 Number of Holdings 140 Portfolio Turnover 7% |
| Holdings [Text Block] | Top Sectors (% of Net Assets) Information Technology 20.5% Industrials 14.8% Health Care 13.5% Financials 9.7% Consumer Staples 9.4% Energy 8.0% Materials 8.0% Consumer Discretionary 6.7% Communication Services 5.3% Cash & Other 4.1% Security Type (% of Net Assets) Common Stocks 68.8% Corporate Bonds 29.6% Real Estate Investment Trusts 0.9% Short-Term Investments 0.5% Cash & Other 0.2% Top 10 Issuers (% of Net Assets) Apple Inc. 3.1% Microsoft Corp. 2.8% Oracle Corp. 2.6% Amazon.com, Inc. 2.6% NVIDIA Corp. 2.4% Alphabet Inc. - Class C 2.2% Home Depot, Inc. 1.9% Walmart, Inc. 1.9% Thermo Fisher Scientific, Inc. 1.8% Colgate-Palmolive Co. 1.8% |
| Updated Prospectus Web Address | https://www.lkcmfunds.com/literature |
| LKCM Fixed Income Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | LKCM Fixed Income Fund |
| Class Name | LKCM Fixed Income Fund |
| Trading Symbol | LKFIX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the LKCM Fixed Income Fund for the period of January 1, 2024, to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.lkcmfunds.com/literature . You can also request this information by contacting us at 1-800-688-LKCM. |
| Additional Information Phone Number | 1-800-688-LKCM |
| Additional Information Website | https://www.lkcmfunds.com/literature |
| Expenses [Text Block] | WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment) Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment LKCM Fixed Income Fund $25 0.50% |
| Expenses Paid, Amount | $ 25 |
| Expense Ratio, Percent | 0.50% |
| Updated Performance Information Location [Text Block] | Visit https://www.lkcmfunds.com/lkcmfund/lkcm-fixed-income-fund/ for recent performance information. |
| Net Assets | $ 273,908,823 |
| Holdings Count | $ / shares | 97 |
| Investment Company Portfolio Turnover | 14% |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of June 30, 2024) Net Assets $273,908,823 Number of Holdings 97 Portfolio Turnover 14% Average Credit Quality AAA Effective Duration 3.3 yrs 30-Day SEC Yield 4.37% |
| Holdings [Text Block] | Top Sectors (% of Net Assets) U.S. Government Sponsored Entities 24.3% Industrials 12.1% Health Care 11.1% Information Technology 10.8% Government Bonds 9.2% Energy 8.3% Consumer Discretionary 5.1% Financials 4.3% Communication Services 3.8% Cash and Other 3.5% Consumer Staples 2.8% Real Estate 2.4% Materials 2.3% Top 10 Issuers (% of Net Assets) United States Treasury Note/Bond 3.1% Intuit Inc. 2.8% Emerson Electric Co. 2.7% Kinder Morgan Inc. 2.6% Danaher Corp. 2.0% Trimble Inc. 1.9% Tractor Supply Co. 1.8% Federal Home Loan Bank 1.8% Ball Corp. 1.6% AT&T Inc. 1.5% |
| Updated Prospectus Web Address | https://www.lkcmfunds.com/literature |
| LKCM International Equity Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | LKCM International Equity Fund |
| Class Name | LKCM International Equity Fund |
| Trading Symbol | LKINX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the LKCM International Equity Fund for the period of January 1, 2024, to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.lkcmfunds.com/literature . You can also request this information by contacting us at 1-800-688-LKCM. |
| Additional Information Phone Number | 1-800-688-LKCM |
| Additional Information Website | https://www.lkcmfunds.com/literature |
| Expenses [Text Block] | WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment) Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment LKCM International Equity Fund $51 1.00% |
| Expenses Paid, Amount | $ 51 |
| Expense Ratio, Percent | 1% |
| Updated Performance Information Location [Text Block] | Visit https://www.lkcmfunds.com/lkcmfund/lkcm-international-equity-fund/ for recent performance information. |
| Net Assets | $ 61,500,914 |
| Holdings Count | $ / shares | 46 |
| Investment Company Portfolio Turnover | 10% |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of June 30, 2024) Net Assets $61,500,914 Number of Holdings 46 Portfolio Turnover 10% |
| Holdings [Text Block] | Top Sectors (% of Net Assets) Industrials 22.6% Financials 16.0% Information Technology 13.9% Consumer Discretionary 11.6% Health Care 8.8% Consumer Staples 8.0% Energy 6.2% Materials 5.7% Communication Services 4.3% Cash & Other 2.9% Top 10 Issuers (% of Net Assets) SAP SE 3.7% ASML Holding NV 3.6% ABB Ltd. 2.8% Air Liquide SA 2.8% Alcon, Inc. 2.7% Shell PLC 2.6% Euronext NV 2.6% Barclays PLC 2.6% Rentokil Initial PLC 2.5% ING Groep NV 2.5% Top Ten Countries (% of Net Assets) United Kingdom 23.2% France 13.8% Germany 13.6% Switzerland 11.7% Netherlands 11.0% Canada 6.0% Japan 3.6% Australia 3.1% Spain 2.2% Ireland 2.0% |
| Updated Prospectus Web Address | https://www.lkcmfunds.com/literature |
| LKCM Aquinas Catholic Equity Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | LKCM Aquinas Catholic Equity Fund |
| Class Name | LKCM Aquinas Catholic Equity Fund |
| Trading Symbol | AQEIX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the LKCM Aquinas Catholic Equity Fund (the “Fund”) for the period of January 1, 2024, to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.aquinasfunds.com/applications-documents/ . You can also request this information by contacting us at 1-800-423-6369. |
| Additional Information Phone Number | 1-800-423-6369 |
| Additional Information Website | https://www.aquinasfunds.com/applications-documents/ |
| Expenses [Text Block] | WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment) Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment LKCM Aquinas Catholic Equity Fund $52 1.00% |
| Expenses Paid, Amount | $ 52 |
| Expense Ratio, Percent | 1% |
| Updated Performance Information Location [Text Block] | Visit https://www.aquinasfunds.com/lkcm-aquinas-catholic-equity-fund/ for recent performance information. |
| Net Assets | $ 59,543,365 |
| Holdings Count | $ / shares | 41 |
| Investment Company Portfolio Turnover | 4% |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of June 30, 2024) Net Assets $59,543,365 Number of Holdings 41 Portfolio Turnover 4% |
| Holdings [Text Block] | Top Sectors (% of Net Assets) Information Technology 32.9% Industrials 12.7% Materials 11.5% Energy 9.2% Consumer Discretionary 9.1% Health Care 8.1% Consumer Staples 6.1% Communication Services 4.7% Financials 3.8% Cash & Other 1.9% Top 10 Issuers (% of Net Assets) Microsoft Corp. 4.9% NVIDIA Corp. 4.8% Alphabet, Inc. - Class A 4.7% Oracle Corp. 4.5% Roper Technologies, Inc. 3.8% Apple Inc. 3.5% Adobe, Inc. 3.4% Stryker Corp. 3.2% American Express Company 3.1% Zoetis, Inc. 2.9% |
| Updated Prospectus Web Address | https://www.aquinasfunds.com/applications-documents/ |
| Shareholder Report, Holdings (Details) | Jun. 30, 2024 |
| LKCM Small Cap Equity Fund | BellRing Brands, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| LKCM Small Cap Equity Fund | Medpace Holdings, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| LKCM Small Cap Equity Fund | CSW Industrials, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| LKCM Small Cap Equity Fund | Q2 Holdings, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| LKCM Small Cap Equity Fund | ESAB Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| LKCM Small Cap Equity Fund | Altair Engineering, Inc. - Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| LKCM Small Cap Equity Fund | Primo Water Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| LKCM Small Cap Equity Fund | Palomar Holdings, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| LKCM Small Cap Equity Fund | Crocs Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| LKCM Small Cap Equity Fund | Hawkins Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| LKCM Small Cap Equity Fund | Industrials [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.60% |
| LKCM Small Cap Equity Fund | Financials [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.20% |
| LKCM Small Cap Equity Fund | Information Technology [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.10% |
| LKCM Small Cap Equity Fund | Consumer Discretionary [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.50% |
| LKCM Small Cap Equity Fund | Health Care [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.20% |
| LKCM Small Cap Equity Fund | Cash & Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.90% |
| LKCM Small Cap Equity Fund | Energy [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| LKCM Small Cap Equity Fund | Materials [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.80% |
| LKCM Small Cap Equity Fund | Consumer Staples [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| LKCM Small Cap Equity Fund | Communication Services [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| LKCM Small Cap Equity Fund | Real Estate [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| LKCM Small-Mid Cap Equity Fund | Q2 Holdings, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| LKCM Small-Mid Cap Equity Fund | Enovis Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| LKCM Small-Mid Cap Equity Fund | Murphy USA, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| LKCM Small-Mid Cap Equity Fund | Palomar Holdings, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| LKCM Small-Mid Cap Equity Fund | Tower Semiconductor Ltd. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| LKCM Small-Mid Cap Equity Fund | Altair Engineering, Inc. - Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| LKCM Small-Mid Cap Equity Fund | Permian Resources Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| LKCM Small-Mid Cap Equity Fund | CSW Industrials, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| LKCM Small-Mid Cap Equity Fund | Ensign Group, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| LKCM Small-Mid Cap Equity Fund | Natera Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| LKCM Small-Mid Cap Equity Fund | Industrials [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 24.80% |
| LKCM Small-Mid Cap Equity Fund | Financials [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.10% |
| LKCM Small-Mid Cap Equity Fund | Information Technology [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.40% |
| LKCM Small-Mid Cap Equity Fund | Consumer Discretionary [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.10% |
| LKCM Small-Mid Cap Equity Fund | Health Care [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.10% |
| LKCM Small-Mid Cap Equity Fund | Energy [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| LKCM Small-Mid Cap Equity Fund | Real Estate [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.10% |
| LKCM Small-Mid Cap Equity Fund | Cash & Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| LKCM Small-Mid Cap Equity Fund | Materials [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| LKCM Small-Mid Cap Equity Fund | Consumer Staples [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| LKCM Small-Mid Cap Equity Fund | Communication Services [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| LKCM Equity Fund | Microsoft Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.40% |
| LKCM Equity Fund | Apple Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| LKCM Equity Fund | Alphabet, Inc. - Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| LKCM Equity Fund | NVIDIA Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| LKCM Equity Fund | Oracle Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| LKCM Equity Fund | Waste Connections, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| LKCM Equity Fund | JPMorgan Chase & Co. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| LKCM Equity Fund | FTAI Aviation Ltd. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| LKCM Equity Fund | Ecolab, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| LKCM Equity Fund | ConocoPhillips [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| LKCM Equity Fund | Information Technology [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 26.70% |
| LKCM Equity Fund | Industrials [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.50% |
| LKCM Equity Fund | Health Care [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.30% |
| LKCM Equity Fund | Materials [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.90% |
| LKCM Equity Fund | Energy [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| LKCM Equity Fund | Consumer Discretionary [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| LKCM Equity Fund | Financials [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.80% |
| LKCM Equity Fund | Consumer Staples [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| LKCM Equity Fund | Communication Services [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| LKCM Equity Fund | Cash & Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| LKCM Balanced Fund | Apple Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| LKCM Balanced Fund | Microsoft Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| LKCM Balanced Fund | Oracle Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| LKCM Balanced Fund | Amazon.com, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| LKCM Balanced Fund | NVIDIA Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| LKCM Balanced Fund | Alphabet Inc. - Class C [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| LKCM Balanced Fund | Home Depot, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| LKCM Balanced Fund | Walmart, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| LKCM Balanced Fund | Thermo Fisher Scientific, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| LKCM Balanced Fund | Colgate-Palmolive Co. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| LKCM Balanced Fund | Information Technology [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.50% |
| LKCM Balanced Fund | Industrials [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.80% |
| LKCM Balanced Fund | Health Care [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.50% |
| LKCM Balanced Fund | Financials [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.70% |
| LKCM Balanced Fund | Consumer Staples [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.40% |
| LKCM Balanced Fund | Energy [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| LKCM Balanced Fund | Materials [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| LKCM Balanced Fund | Consumer Discretionary [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.70% |
| LKCM Balanced Fund | Communication Services [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| LKCM Balanced Fund | Cash & Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| LKCM Balanced Fund | Common Stocks [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 68.80% |
| LKCM Balanced Fund | Corporate Bonds [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 29.60% |
| LKCM Balanced Fund | Real Estate Investment Trusts [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| LKCM Balanced Fund | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| LKCM Balanced Fund | Cash & Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| LKCM Fixed Income Fund | United States Treasury Note/Bond [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| LKCM Fixed Income Fund | Intuit Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| LKCM Fixed Income Fund | Emerson Electric Co. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| LKCM Fixed Income Fund | Kinder Morgan Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| LKCM Fixed Income Fund | Danaher Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| LKCM Fixed Income Fund | Trimble Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| LKCM Fixed Income Fund | Tractor Supply Co. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| LKCM Fixed Income Fund | Federal Home Loan Bank [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| LKCM Fixed Income Fund | Ball Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| LKCM Fixed Income Fund | AT&T Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| LKCM Fixed Income Fund | U.S. Government Sponsored Entities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 24.30% |
| LKCM Fixed Income Fund | Industrials [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.10% |
| LKCM Fixed Income Fund | Health Care [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.10% |
| LKCM Fixed Income Fund | Information Technology [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.80% |
| LKCM Fixed Income Fund | Government Bonds [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.20% |
| LKCM Fixed Income Fund | Energy [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.30% |
| LKCM Fixed Income Fund | Consumer Discretionary [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.10% |
| LKCM Fixed Income Fund | Financials [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| LKCM Fixed Income Fund | Communication Services [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| LKCM Fixed Income Fund | Cash and Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| LKCM Fixed Income Fund | Consumer Staples [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| LKCM Fixed Income Fund | Real Estate [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| LKCM Fixed Income Fund | Materials [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| LKCM International Equity Fund | SAP SE [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.70% |
| LKCM International Equity Fund | ASML Holding NV [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| LKCM International Equity Fund | ABB Ltd. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| LKCM International Equity Fund | Air Liquide SA [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| LKCM International Equity Fund | Alcon, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| LKCM International Equity Fund | Shell PLC [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| LKCM International Equity Fund | Euronext NV [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| LKCM International Equity Fund | Barclays PLC [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| LKCM International Equity Fund | Rentokil Initial PLC [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| LKCM International Equity Fund | ING Groep NV [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| LKCM International Equity Fund | Industrials [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.60% |
| LKCM International Equity Fund | Financials [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16% |
| LKCM International Equity Fund | Information Technology [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.90% |
| LKCM International Equity Fund | Consumer Discretionary [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.60% |
| LKCM International Equity Fund | Health Care [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.80% |
| LKCM International Equity Fund | Consumer Staples [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| LKCM International Equity Fund | Energy [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.20% |
| LKCM International Equity Fund | Materials [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.70% |
| LKCM International Equity Fund | Communication Services [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| LKCM International Equity Fund | Cash & Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| LKCM International Equity Fund | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.20% |
| LKCM International Equity Fund | France | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.80% |
| LKCM International Equity Fund | Germany | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.60% |
| LKCM International Equity Fund | Switzerland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.70% |
| LKCM International Equity Fund | Netherlands | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11% |
| LKCM International Equity Fund | Canada | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| LKCM International Equity Fund | Japan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| LKCM International Equity Fund | Australia | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| LKCM International Equity Fund | Spain | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| LKCM International Equity Fund | Ireland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| LKCM Aquinas Catholic Equity Fund | Microsoft Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| LKCM Aquinas Catholic Equity Fund | NVIDIA Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| LKCM Aquinas Catholic Equity Fund | Alphabet, Inc. - Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| LKCM Aquinas Catholic Equity Fund | Oracle Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| LKCM Aquinas Catholic Equity Fund | Roper Technologies, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| LKCM Aquinas Catholic Equity Fund | Apple Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| LKCM Aquinas Catholic Equity Fund | Adobe, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| LKCM Aquinas Catholic Equity Fund | Stryker Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| LKCM Aquinas Catholic Equity Fund | American Express Company [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| LKCM Aquinas Catholic Equity Fund | Zoetis, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| LKCM Aquinas Catholic Equity Fund | Information Technology [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 32.90% |
| LKCM Aquinas Catholic Equity Fund | Industrials [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.70% |
| LKCM Aquinas Catholic Equity Fund | Materials [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.50% |
| LKCM Aquinas Catholic Equity Fund | Energy [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.20% |
| LKCM Aquinas Catholic Equity Fund | Consumer Discretionary [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.10% |
| LKCM Aquinas Catholic Equity Fund | Health Care [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.10% |
| LKCM Aquinas Catholic Equity Fund | Consumer Staples [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| LKCM Aquinas Catholic Equity Fund | Communication Services [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| LKCM Aquinas Catholic Equity Fund | Financials [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| LKCM Aquinas Catholic Equity Fund | Cash & Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
