$DHIL
DIAMOND HILL INVESTMENT GROUP INC Stock $dhil

$dhil Overview Financials Valuation SEC Filings Company Website

2024 Q1 Form 10-K Financial Statement

#000090910824000008 Filed on February 29, 2024

Income Statement

Concept	2024 Q1	2023 Q4	2023
Revenue	$36.29M	$33.82M	$136.7M
YoY Change	6.78%	-3.24%	-11.51%
Cost Of Revenue	$825.1K	$828.5K	$3.262M
YoY Change	5.39%	1.08%	-0.99%
Gross Profit	$35.47M	$32.99M	$133.5M
YoY Change	6.81%	-3.34%	-11.74%
Gross Profit Margin	97.73%	97.55%	97.61%
Selling, General & Admin	$5.829M	$24.85M	$21.62M
YoY Change	13.0%	9.73%	4.11%
% of Gross Profit	16.43%	75.31%	16.2%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$319.9K	$316.9K	$1.289M
YoY Change	-2.46%	-4.16%	-6.41%
% of Gross Profit	0.9%	0.96%	0.97%
Operating Expenses	$27.99M	$28.58M	$101.2M
YoY Change	21.45%	13.58%	12.25%
Operating Profit	$8.303M	$4.415M	$35.50M
YoY Change	-24.12%	-50.8%	-44.81%
Interest Expense	$9.381M	$13.36M	$23.25M
YoY Change	16.06%	1.47%	-276.19%
% of Operating Profit	112.98%	302.68%	65.48%
Other Income/Expense, Net	$9.366M	-$14.61K	-$175.1K
YoY Change	15.87%	-73.32%	-2.32%
Pretax Income	$17.67M	$17.76M	$58.58M
YoY Change	-7.13%	-19.58%	14.95%
Income Tax	$4.653M	$4.151M	$15.49M
% Of Pretax Income	26.33%	23.37%	26.44%
Net Earnings	$13.02M	$13.61M	$42.23M
YoY Change	2.43%	-8.5%	4.43%
Net Earnings / Revenue	35.86%	40.25%	30.89%
Basic Earnings Per Share	$4.62		$14.32
Diluted Earnings Per Share	$4.62	$4.76	$14.32
COMMON SHARES
Basic Shares Outstanding	2.844M shares	2.878M shares	2.949M shares
Diluted Shares Outstanding	2.817M shares		2.949M shares

Balance Sheet

Concept	2024 Q1	2023 Q4	2023
SHORT-TERM ASSETS
Cash & Short-Term Investments	$17.59M	$46.99M	$46.99M
YoY Change	-56.38%	-25.64%	-25.64%
Cash & Equivalents	$17.59M	$46.99M	$46.99M
Short-Term Investments
Other Short-Term Assets	$3.238M	$3.509M	$3.509M
YoY Change	-5.61%	2.16%	2.16%
Inventory
Prepaid Expenses
Receivables	$21.30M	$18.05M	$18.05M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$42.13M	$68.55M	$68.55M
YoY Change	-32.71%	-18.35%	-18.35%
LONG-TERM ASSETS
Property, Plant & Equipment	$2.281M	$2.592M	$2.592M
YoY Change	-41.72%	-40.4%	-40.4%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$91.08M	$84.53M	$147.7M
YoY Change	257.02%	250.66%	1.42%
Other Assets	$9.757M	$11.59M	$11.59M
YoY Change	-26.26%	-19.37%	-19.37%
Total Long-Term Assets	$167.0M	$163.5M	$163.5M
YoY Change	-2.89%	-1.4%	-1.4%
TOTAL ASSETS
Total Short-Term Assets	$42.13M	$68.55M	$68.55M
Total Long-Term Assets	$167.0M	$163.5M	$163.5M
Total Assets	$209.1M	$232.1M	$232.1M
YoY Change	-10.85%	-7.1%	-7.1%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$5.010M	$5.390M	$5.390M
YoY Change	-29.99%	-30.7%	-30.7%
Accrued Expenses	$7.387M	$30.30M	$30.30M
YoY Change	1.63%	-9.55%	-9.55%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$13.26M	$35.69M	$35.69M
YoY Change	-20.71%	-13.54%	-13.54%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$37.54M	$36.09M	$36.09M
YoY Change	20.21%	17.38%	17.38%
Total Long-Term Liabilities	$37.54M	$36.09M	$36.09M
YoY Change	20.21%	17.38%	17.38%
TOTAL LIABILITIES
Total Short-Term Liabilities	$13.26M	$35.69M	$35.69M
Total Long-Term Liabilities	$37.54M	$36.09M	$36.09M
Total Liabilities	$50.80M	$71.78M	$71.78M
YoY Change	5.94%	-0.34%	-16.68%
SHAREHOLDERS EQUITY
Retained Earnings	$162.3M	$153.5M
YoY Change	18.38%	19.03%
Common Stock	$19.03M	$22.16M
YoY Change	-65.83%	-57.12%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$158.3M	$160.3M	$160.3M
YoY Change
Total Liabilities & Shareholders Equity	$209.1M	$232.1M	$232.1M
YoY Change	-10.85%	-7.1%	-7.1%

Cashflow Statement

Concept	2024 Q1	2023 Q4	2023
OPERATING ACTIVITIES
Net Income	$13.02M	$13.61M	$42.23M
YoY Change	2.43%	-8.5%	4.43%
Depreciation, Depletion And Amortization	$319.9K	$316.9K	$1.289M
YoY Change	-2.46%	-4.16%	-6.41%
Cash From Operating Activities	-$12.29M	$23.04M	$34.67M
YoY Change	-10.82%	-1.08%	-12.19%
INVESTING ACTIVITIES
Capital Expenditures	$133.4K	$1.710K	$21.71K
YoY Change	861.37%	-97.82%	-78.61%
Acquisitions
YoY Change
Other Investing Activities	$1.242M	-$2.357M	-$4.184M
YoY Change	-242.33%	0.34%	-168.19%
Cash From Investing Activities	$1.109M	-$2.357M	-$4.206M
YoY Change	-225.06%	-2.91%	-169.7%
FINANCING ACTIVITIES
Cash Dividend Paid	$4.229M
YoY Change	-7.59%
Common Stock Issuance & Retirement, Net			$34.62M
YoY Change			-10.6%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-$18.22M	-19.43M	-$46.67M
YoY Change	122.36%	-6.84%	-25.77%
NET CHANGE
Cash From Operating Activities	-$12.29M	23.04M	$34.67M
Cash From Investing Activities	$1.109M	-2.357M	-$4.206M
Cash From Financing Activities	-$18.22M	-19.43M	-$46.67M
Net Change In Cash	-$29.40M	1.250M	-$16.20M
YoY Change	28.6%	22512.84%	-6.64%
FREE CASH FLOW
Cash From Operating Activities	-$12.29M	$23.04M	$34.67M
Capital Expenditures	$133.4K	$1.710K	$21.71K
Free Cash Flow	-$12.42M	$23.04M	$34.65M
YoY Change	-9.94%	-0.76%	-12.02%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	14.32
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	13.01
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	23.34
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	14.32
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	13.01
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	3107604	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	3179497	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	3107604	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	3107604	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	3179497	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	3179497	shares
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	184080753	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	184422902	usd
CY2021Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	17756336	usd
CY2023	dei	Entity Central Index Key EntityCentralIndexKey	0000909108
CY2023	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2023	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2023	dei	Amendment Flag AmendmentFlag	false
CY2023Q2	dei	Entity Public Float EntityPublicFloat	483389072	usd
CY2023Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	7000000	shares
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	7000000	shares
CY2023Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	2823076	shares
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	3010457	shares
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	2823076	shares
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	3010457	shares
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	190172	shares
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	211575	shares
CY2023Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000	shares
CY2022Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000	shares
CY2023Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2022Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2023	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	6.00
CY2022	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	10.00
CY2021	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	23.00
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	0	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	0	usd
CY2023	dhil	Rolling Client Investment Performance Period RollingClientInvestmentPerformancePeriod	P5Y
CY2023	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	1	payment
CY2022Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000	shares
CY2023Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2022Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2023Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2022Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#PropertyPlantAndEquipmentNet
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#PropertyPlantAndEquipmentNet
CY2022Q4	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent
CY2023Q4	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent
CY2023	dei	Document Annual Report DocumentAnnualReport	true
CY2023	dei	Document Period End Date DocumentPeriodEndDate	2023-12-31
CY2023	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2023	dei	Document Transition Report DocumentTransitionReport	false
CY2023	dei	Entity Registrant Name EntityRegistrantName	DIAMOND HILL INVESTMENT GROUP, INC.
CY2023	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	OH
CY2023	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	65-0190407
CY2023	dei	Entity Address Address Line1 EntityAddressAddressLine1	325 John H. McConnell Blvd
CY2023	dei	Local Phone Number LocalPhoneNumber	255-3333
CY2023	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2023	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2023	dei	Entity Small Business EntitySmallBusiness	false
CY2023	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2023	dei	Entity Shell Company EntityShellCompany	false
CY2023	dei	Document Fin Stmt Error Correction Flag DocumentFinStmtErrorCorrectionFlag	false
CY2023	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2023	dei	Entity Shell Company EntityShellCompany	false
CY2023	dei	Document Fin Stmt Error Correction Flag DocumentFinStmtErrorCorrectionFlag	false
CY2023	dei	Entity Shell Company EntityShellCompany	false
CY2023	dei	Document Fin Stmt Error Correction Flag DocumentFinStmtErrorCorrectionFlag	false
CY2023	dei	Entity Shell Company EntityShellCompany	false
CY2023	dei	Document Fin Stmt Error Correction Flag DocumentFinStmtErrorCorrectionFlag	false
CY2023Q2	dei	Entity Public Float EntityPublicFloat	483389072	usd
CY2024Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	2843585	shares
CY2023	dei	Auditor Firm AuditorFirmId	185
CY2023	dei	Auditor Name AuditorName	KPMG LLP
CY2023	dei	Auditor Location AuditorLocation	Columbus, Ohio
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	46991879	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	63195302	usd
CY2023Q4	us-gaap	Investments Investments	147738862	usd
CY2022Q4	us-gaap	Investments Investments	145675711	usd
CY2023Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	18051241	usd
CY2022Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	17329034	usd
CY2023Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	3509460	usd
CY2022Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	3435269	usd
CY2023Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	1620864	usd
CY2023	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 200
CY2023	dei	Entity Address City Or Town EntityAddressCityOrTown	Columbus
CY2023	dei	Entity Address State Or Province EntityAddressStateOrProvince	OH
CY2023	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	43215
CY2023	dei	City Area Code CityAreaCode	614
CY2023	dei	Local Phone Number LocalPhoneNumber	255-3333
CY2023	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2023	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2023	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2023	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2023	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2023	dei	Entity Small Business EntitySmallBusiness	false
CY2023	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2023	dei	Entity Shell Company EntityShellCompany	false
CY2023	dei	Document Fin Stmt Error Correction Flag DocumentFinStmtErrorCorrectionFlag	false
CY2023	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2023	dei	Entity Shell Company EntityShellCompany	false
CY2023	dei	Document Fin Stmt Error Correction Flag DocumentFinStmtErrorCorrectionFlag	false
CY2023	dei	Entity Shell Company EntityShellCompany	false
CY2023	dei	Document Fin Stmt Error Correction Flag DocumentFinStmtErrorCorrectionFlag	false
CY2023	dei	Entity Shell Company EntityShellCompany	false
CY2023	dei	Document Fin Stmt Error Correction Flag DocumentFinStmtErrorCorrectionFlag	false
CY2023Q2	dei	Entity Public Float EntityPublicFloat	483389072	usd
CY2024Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	2843585	shares
CY2023	dei	Auditor Firm AuditorFirmId	185
CY2023	dei	Auditor Name AuditorName	KPMG LLP
CY2023	dei	Auditor Location AuditorLocation	Columbus, Ohio
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	46991879	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	63195302	usd
CY2023Q4	us-gaap	Investments Investments	147738862	usd
CY2022Q4	us-gaap	Investments Investments	145675711	usd
CY2023Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	18051241	usd
CY2022Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	17329034	usd
CY2023Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	3509460	usd
CY2022Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	3435269	usd
CY2023Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	1620864	usd
CY2022Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	1463547	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2591604	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	4348341	usd
CY2023Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	11590438	usd
CY2022Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	14374206	usd
CY2023Q4	us-gaap	Assets Assets	232094348	usd
CY2022Q4	us-gaap	Assets Assets	249821410	usd
CY2023Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	6190370	usd
CY2022Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	9177977	usd
CY2023Q4	us-gaap	Accrued Bonuses Current AccruedBonusesCurrent	29500000	usd
CY2022Q4	us-gaap	Accrued Bonuses Current AccruedBonusesCurrent	32100000	usd
CY2023Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	36087170	usd
CY2022Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	30744990	usd
CY2023Q4	us-gaap	Liabilities Liabilities	71777540	usd
CY2022Q4	us-gaap	Liabilities Liabilities	72022967	usd
CY2022Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	1463547	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2591604	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	4348341	usd
CY2023Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	11590438	usd
CY2022Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	14374206	usd
CY2023Q4	us-gaap	Assets Assets	232094348	usd
CY2022Q4	us-gaap	Assets Assets	249821410	usd
CY2023Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	6190370	usd
CY2022Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	9177977	usd
CY2023Q4	us-gaap	Accrued Bonuses Current AccruedBonusesCurrent	29500000	usd
CY2022Q4	us-gaap	Accrued Bonuses Current AccruedBonusesCurrent	32100000	usd
CY2023Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	36087170	usd
CY2022Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	30744990	usd
CY2023Q4	us-gaap	Liabilities Liabilities	71777540	usd
CY2022Q4	us-gaap	Liabilities Liabilities	72022967	usd
CY2023Q4	us-gaap	Redeemable Noncontrolling Interest Equity Common Fair Value RedeemableNoncontrollingInterestEquityCommonFairValue	0	usd
CY2022Q4	us-gaap	Redeemable Noncontrolling Interest Equity Common Fair Value RedeemableNoncontrollingInterestEquityCommonFairValue	14126198	usd
CY2023Q4	us-gaap	Common Stock Value CommonStockValue	22164410	usd
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	51688631	usd
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CY2022Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	usd
CY2023Q4	us-gaap	Deferred Compensation Equity DeferredCompensationEquity	15392418	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	153544816	usd
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CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	160316808	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	163672245	usd
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	232094348	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	249821410	usd
CY2023	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	136716371	usd
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	154496019	usd
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	182193837	usd
CY2023	us-gaap	Labor And Related Expense LaborAndRelatedExpense	70730640	usd
CY2022	us-gaap	Labor And Related Expense LaborAndRelatedExpense	70505216	usd
CY2021	us-gaap	Labor And Related Expense LaborAndRelatedExpense	73591327	usd
CY2023	dhil	Deferred Compensation Expense Benefit DeferredCompensationExpenseBenefit	5599880	usd
CY2022	dhil	Deferred Compensation Expense Benefit DeferredCompensationExpenseBenefit	-4402265	usd
CY2021	dhil	Deferred Compensation Expense Benefit DeferredCompensationExpenseBenefit	7082153	usd
CY2023	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	14935033	usd
CY2022	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	13606922	usd
CY2021	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	14020836	usd
CY2023	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	6684410	usd
CY2022	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	7159686	usd
CY2021	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	7659423	usd
CY2023	dhil	Mutual Fund Administration MutualFundAdministration	3262421	usd
CY2022	dhil	Mutual Fund Administration MutualFundAdministration	3294983	usd
CY2021	dhil	Mutual Fund Administration MutualFundAdministration	3581960	usd
CY2023	us-gaap	Operating Expenses OperatingExpenses	101212384	usd
CY2022	us-gaap	Operating Expenses OperatingExpenses	90164542	usd
CY2021	us-gaap	Operating Expenses OperatingExpenses	105935699	usd
CY2023	us-gaap	Operating Income Loss OperatingIncomeLoss	35503987	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	64331477	usd
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	76258138	usd
CY2023	us-gaap	Investment Income Net InvestmentIncomeNet	23071441	usd
CY2023Q4	us-gaap	Redeemable Noncontrolling Interest Equity Common Fair Value RedeemableNoncontrollingInterestEquityCommonFairValue	0	usd
CY2022Q4	us-gaap	Redeemable Noncontrolling Interest Equity Common Fair Value RedeemableNoncontrollingInterestEquityCommonFairValue	14126198	usd
CY2023Q4	us-gaap	Common Stock Value CommonStockValue	22164410	usd
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	51688631	usd
CY2023Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	usd
CY2022Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	usd
CY2023Q4	us-gaap	Deferred Compensation Equity DeferredCompensationEquity	15392418	usd
CY2022Q4	us-gaap	Deferred Compensation Equity DeferredCompensationEquity	17011144	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	153544816	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	128994758	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	160316808	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	163672245	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	249821410	usd
CY2023	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	136716371	usd
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	154496019	usd
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	182193837	usd
CY2023	us-gaap	Labor And Related Expense LaborAndRelatedExpense	70730640	usd
CY2022	us-gaap	Labor And Related Expense LaborAndRelatedExpense	70505216	usd
CY2021	us-gaap	Labor And Related Expense LaborAndRelatedExpense	73591327	usd
CY2023	dhil	Deferred Compensation Expense Benefit DeferredCompensationExpenseBenefit	5599880	usd
CY2022	dhil	Deferred Compensation Expense Benefit DeferredCompensationExpenseBenefit	-4402265	usd
CY2021	dhil	Deferred Compensation Expense Benefit DeferredCompensationExpenseBenefit	7082153	usd
CY2023	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	14935033	usd
CY2022	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	13606922	usd
CY2021	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	14020836	usd
CY2023	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	6684410	usd
CY2022	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	7159686	usd
CY2021	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	7659423	usd
CY2023	dhil	Mutual Fund Administration MutualFundAdministration	3262421	usd
CY2022	dhil	Mutual Fund Administration MutualFundAdministration	3294983	usd
CY2021	dhil	Mutual Fund Administration MutualFundAdministration	3581960	usd
CY2023	us-gaap	Operating Expenses OperatingExpenses	101212384	usd
CY2022	us-gaap	Operating Expenses OperatingExpenses	90164542	usd
CY2021	us-gaap	Operating Expenses OperatingExpenses	105935699	usd
CY2023	us-gaap	Operating Income Loss OperatingIncomeLoss	35503987	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	64331477	usd
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	76258138	usd
CY2023	us-gaap	Investment Income Net InvestmentIncomeNet	23071441	usd
CY2022	us-gaap	Investment Income Net InvestmentIncomeNet	-20186511	usd
CY2021	us-gaap	Investment Income Net InvestmentIncomeNet	16381216	usd
CY2023	dhil	Gain Loss On Derecognition Of Nonfinancial Assets GainLossOnDerecognitionOfNonfinancialAssets	0	usd
CY2022	dhil	Gain Loss On Derecognition Of Nonfinancial Assets GainLossOnDerecognitionOfNonfinancialAssets	6813579	usd
CY2021	dhil	Gain Loss On Derecognition Of Nonfinancial Assets GainLossOnDerecognitionOfNonfinancialAssets	9000000	usd
CY2023	dhil	Non Operating Income Loss NonOperatingIncomeLoss	23071441	usd
CY2022	dhil	Non Operating Income Loss NonOperatingIncomeLoss	-13372932	usd
CY2021	dhil	Non Operating Income Loss NonOperatingIncomeLoss	25381216	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	58575428	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	50958545	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	101639354	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	15489880	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14087783	usd
CY2023	us-gaap	Profit Loss ProfitLoss	43085548	usd
CY2022	us-gaap	Profit Loss ProfitLoss	36870762	usd
CY2022	us-gaap	Investment Income Net InvestmentIncomeNet	-20186511	usd
CY2021	us-gaap	Investment Income Net InvestmentIncomeNet	16381216	usd
CY2023	dhil	Gain Loss On Derecognition Of Nonfinancial Assets GainLossOnDerecognitionOfNonfinancialAssets	0	usd
CY2022	dhil	Gain Loss On Derecognition Of Nonfinancial Assets GainLossOnDerecognitionOfNonfinancialAssets	6813579	usd
CY2021	dhil	Gain Loss On Derecognition Of Nonfinancial Assets GainLossOnDerecognitionOfNonfinancialAssets	9000000	usd
CY2023	dhil	Non Operating Income Loss NonOperatingIncomeLoss	23071441	usd
CY2022	dhil	Non Operating Income Loss NonOperatingIncomeLoss	-13372932	usd
CY2021	dhil	Non Operating Income Loss NonOperatingIncomeLoss	25381216	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	58575428	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	50958545	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	101639354	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	15489880	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14087783	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	26049815	usd
CY2023	us-gaap	Profit Loss ProfitLoss	43085548	usd
CY2022	us-gaap	Profit Loss ProfitLoss	36870762	usd
CY2021	us-gaap	Profit Loss ProfitLoss	75589539	usd
CY2023	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	859126	usd
CY2022	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-3563345	usd
CY2021	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	1388930	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	42226422	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	74200609	usd
CY2020Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	9372333	usd
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	529806	usd
CY2021	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	87667	usd
CY2021	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	748472	usd
CY2021	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	1625413	usd
CY2021	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	7820315	usd
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	72960976	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	74200609	usd
CY2021	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	1388930	usd
CY2021	dhil	Subscription From Redemption Distribution To Noncontrolling Interest SubscriptionFromRedemptionDistributionToNoncontrollingInterest	10298891	usd
CY2021	dhil	Noncontrolling Interest Increase Decreasefrom Consolidation Deconsolidation NoncontrollingInterestIncreaseDecreasefromConsolidationDeconsolidation	-3303818	usd
CY2022	dhil	Amortization Of Restricted Stock Grants AmortizationOfRestrictedStockGrants	10530486	usd
CY2022	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	487870	usd
CY2022	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	37313	usd
CY2022	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	619159	usd
CY2022	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	3436678	usd
CY2022	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	0	usd
CY2022	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	38726007	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	40434107	usd
CY2022	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-3563345	usd
CY2022	dhil	Noncontrolling Interest Increase Decreasefrom Consolidation Deconsolidation NoncontrollingInterestIncreaseDecreasefromConsolidationDeconsolidation	-9528503	usd
CY2022	dhil	Subscription From Redemption Distribution To Noncontrolling Interest SubscriptionFromRedemptionDistributionToNoncontrollingInterest	9461710	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	163672245	usd
CY2022Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	14126198	usd
CY2023	dhil	Amortization Of Restricted Stock Grants AmortizationOfRestrictedStockGrants	11603239	usd
CY2023	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	16344	usd
CY2023	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	482097	usd
CY2023	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	5131262	usd
CY2023	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	34875913	usd
CY2021	us-gaap	Profit Loss ProfitLoss	75589539	usd
CY2023	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	859126	usd
CY2022	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-3563345	usd
CY2021	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	1388930	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	40434107	usd
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	23.34
CY2021	dhil	Amortization Of Restricted Stock Grants AmortizationOfRestrictedStockGrants	7182299	usd
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	529806	usd
CY2021	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	87667	usd
CY2021	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	748472	usd
CY2021	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	1625413	usd
CY2021	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	7820315	usd
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	72960976	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	74200609	usd
CY2021	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	1388930	usd
CY2021	dhil	Subscription From Redemption Distribution To Noncontrolling Interest SubscriptionFromRedemptionDistributionToNoncontrollingInterest	10298891	usd
CY2021	dhil	Noncontrolling Interest Increase Decreasefrom Consolidation Deconsolidation NoncontrollingInterestIncreaseDecreasefromConsolidationDeconsolidation	-3303818	usd
CY2022	dhil	Amortization Of Restricted Stock Grants AmortizationOfRestrictedStockGrants	10530486	usd
CY2022	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	487870	usd
CY2022	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	37313	usd
CY2022	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	619159	usd
CY2022	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	3436678	usd
CY2022	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	0	usd
CY2022	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	38726007	usd
CY2022	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	30696907	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	40434107	usd
CY2022	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-3563345	usd
CY2022	dhil	Noncontrolling Interest Increase Decreasefrom Consolidation Deconsolidation NoncontrollingInterestIncreaseDecreasefromConsolidationDeconsolidation	-9528503	usd
CY2022	dhil	Subscription From Redemption Distribution To Noncontrolling Interest SubscriptionFromRedemptionDistributionToNoncontrollingInterest	9461710	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	163672245	usd
CY2022Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	14126198	usd
CY2023	dhil	Amortization Of Restricted Stock Grants AmortizationOfRestrictedStockGrants	11603239	usd
CY2023	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	16344	usd
CY2023	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	482097	usd
CY2023	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	5131262	usd
CY2023	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	34875913	usd
CY2023	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	17676364	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	42226422	usd
CY2023	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	859126	usd
CY2023	dhil	Noncontrolling Interest Increase Decreasefrom Consolidation Deconsolidation NoncontrollingInterestIncreaseDecreasefromConsolidationDeconsolidation	-25336181	usd
CY2023	dhil	Subscription From Redemption Distribution To Noncontrolling Interest SubscriptionFromRedemptionDistributionToNoncontrollingInterest	10350857	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	160316808	usd
CY2023Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	0	usd
CY2023	us-gaap	Profit Loss ProfitLoss	43085548	usd
CY2022	us-gaap	Profit Loss ProfitLoss	36870762	usd
CY2021	us-gaap	Profit Loss ProfitLoss	75589539	usd
CY2023	us-gaap	Depreciation Depreciation	1289315	usd
CY2022	us-gaap	Depreciation Depreciation	1377610	usd
CY2021	us-gaap	Depreciation Depreciation	1281420	usd
CY2023	us-gaap	Share Based Compensation ShareBasedCompensation	11691890	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	10660673	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	7415170	usd
CY2023	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	17676364	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	42226422	usd
CY2023	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	859126	usd
CY2023	dhil	Noncontrolling Interest Increase Decreasefrom Consolidation Deconsolidation NoncontrollingInterestIncreaseDecreasefromConsolidationDeconsolidation	-25336181	usd
CY2023	dhil	Subscription From Redemption Distribution To Noncontrolling Interest SubscriptionFromRedemptionDistributionToNoncontrollingInterest	10350857	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	160316808	usd
CY2023Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	0	usd
CY2023	us-gaap	Profit Loss ProfitLoss	43085548	usd
CY2022	us-gaap	Profit Loss ProfitLoss	36870762	usd
CY2021	us-gaap	Profit Loss ProfitLoss	75589539	usd
CY2023	us-gaap	Depreciation Depreciation	1289315	usd
CY2022	us-gaap	Depreciation Depreciation	1377610	usd
CY2021	us-gaap	Depreciation Depreciation	1281420	usd
CY2023	us-gaap	Share Based Compensation ShareBasedCompensation	11691890	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	10660673	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	7415170	usd
CY2023	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	3393686	usd
CY2022	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-3107409	usd
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	2666551	usd
CY2023	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-157317	usd
CY2022	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-2265287	usd
CY2021	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	1058278	usd
CY2023	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-2783768	usd
CY2022	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	4526654	usd
CY2021	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	1410106	usd
CY2023	dhil	Gain Loss On Derecognition Of Nonfinancial Assets GainLossOnDerecognitionOfNonfinancialAssets	0	usd
CY2022	dhil	Gain Loss On Derecognition Of Nonfinancial Assets GainLossOnDerecognitionOfNonfinancialAssets	6813579	usd
CY2021	dhil	Gain Loss On Derecognition Of Nonfinancial Assets GainLossOnDerecognitionOfNonfinancialAssets	9000000	usd
CY2023	us-gaap	Gain Loss On Investments GainLossOnInvestments	16536677	usd
CY2022	us-gaap	Gain Loss On Investments GainLossOnInvestments	-24471894	usd
CY2021	us-gaap	Gain Loss On Investments GainLossOnInvestments	10878658	usd
CY2023	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	10930911	usd
CY2022	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	14039687	usd
CY2021	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	50430607	usd
CY2023	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-2600000	usd
CY2022	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-4647548	usd
CY2021	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	9365224	usd
CY2023	us-gaap	Increase Decrease In Deferred Compensation IncreaseDecreaseInDeferredCompensation	5342180	usd
CY2022	us-gaap	Increase Decrease In Deferred Compensation IncreaseDecreaseInDeferredCompensation	-6603304	usd
CY2021	us-gaap	Increase Decrease In Deferred Compensation IncreaseDecreaseInDeferredCompensation	4106342	usd
CY2023	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-4095014	usd
CY2022	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-1890346	usd
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	34669124	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	39482635	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	26312237	usd
CY2023	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	21705	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	101454	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1104981	usd
CY2023	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	19469955	usd
CY2022	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	7606958	usd
CY2021	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	21395411	usd
CY2023	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	15286036	usd
CY2022	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	6928704	usd
CY2023	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	3393686	usd
CY2022	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-3107409	usd
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	2666551	usd
CY2023	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-157317	usd
CY2022	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-2265287	usd
CY2021	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	1058278	usd
CY2023	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-2783768	usd
CY2022	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	4526654	usd
CY2021	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	1410106	usd
CY2022	dhil	Gain Loss On Derecognition Of Nonfinancial Assets GainLossOnDerecognitionOfNonfinancialAssets	6813579	usd
CY2021	dhil	Gain Loss On Derecognition Of Nonfinancial Assets GainLossOnDerecognitionOfNonfinancialAssets	9000000	usd
CY2023	us-gaap	Gain Loss On Investments GainLossOnInvestments	16536677	usd
CY2022	us-gaap	Gain Loss On Investments GainLossOnInvestments	-24471894	usd
CY2022	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	14039687	usd
CY2021	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	50430607	usd
CY2023	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-2600000	usd
CY2022	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-4647548	usd
CY2021	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	9365224	usd
CY2023	us-gaap	Increase Decrease In Deferred Compensation IncreaseDecreaseInDeferredCompensation	5342180	usd
CY2022	us-gaap	Increase Decrease In Deferred Compensation IncreaseDecreaseInDeferredCompensation	-6603304	usd
CY2021	us-gaap	Increase Decrease In Deferred Compensation IncreaseDecreaseInDeferredCompensation	4106342	usd
CY2023	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-4095014	usd
CY2022	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-1890346	usd
CY2021	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-1882186	usd
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	34669124	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	39482635	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	26312237	usd
CY2023	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	21705	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	101454	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1104981	usd
CY2023	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	19469955	usd
CY2022	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	7606958	usd
CY2021	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	21395411	usd
CY2023	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	15286036	usd
CY2022	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	6928704	usd
CY2021	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	40764891	usd
CY2023	dhil	Proceeds From Sale Of Nonfinancial Assets ProceedsFromSaleOfNonfinancialAssets	0	usd
CY2022	dhil	Proceeds From Sale Of Nonfinancial Assets ProceedsFromSaleOfNonfinancialAssets	6813579	usd
CY2021	dhil	Proceeds From Sale Of Nonfinancial Assets ProceedsFromSaleOfNonfinancialAssets	9000000	usd
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-4205624	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	6033871	usd
CY2023	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	5131262	usd
CY2023	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	17676364	usd
CY2022	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	30696907	usd
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	72960976	usd
CY2021	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	10298891	usd
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	38726007	usd
CY2021	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	40764891	usd
CY2023	dhil	Proceeds From Sale Of Nonfinancial Assets ProceedsFromSaleOfNonfinancialAssets	0	usd
CY2022	dhil	Proceeds From Sale Of Nonfinancial Assets ProceedsFromSaleOfNonfinancialAssets	6813579	usd
CY2021	dhil	Proceeds From Sale Of Nonfinancial Assets ProceedsFromSaleOfNonfinancialAssets	9000000	usd
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-4205624	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	6033871	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	27264499	usd
CY2023	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	5131262	usd
CY2022	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	3436678	usd
CY2023	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	17676364	usd
CY2022	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	30696907	usd
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	72960976	usd
CY2023	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	10350857	usd
CY2021	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	10298891	usd
CY2023	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	34619944	usd
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	38726007	usd
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	7820315	usd
CY2023	dhil	Proceeds Received Under Employee Stock Purchase Plan ProceedsReceivedUnderEmployeeStockPurchasePlan	409790	usd
CY2022	dhil	Proceeds Received Under Employee Stock Purchase Plan ProceedsReceivedUnderEmployeeStockPurchasePlan	526285	usd
CY2021	dhil	Proceeds Received Under Employee Stock Purchase Plan ProceedsReceivedUnderEmployeeStockPurchasePlan	603268	usd
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-46666923	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-62871597	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-71504545	usd
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-16203423	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-17355091	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	63195302	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	80550393	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	98478202	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	46991879	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	63195302	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	80550393	usd
CY2023	us-gaap	Income Taxes Paid IncomeTaxesPaid	12863429	usd
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	20879724	usd
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	26401643	usd
CY2023	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	0	usd
CY2022	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	487870	usd
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	529806	usd
CY2023	dhil	Contributionof Investmentsand Propertyand Equipment ContributionofInvestmentsandPropertyandEquipment	0	usd
CY2022	dhil	Contributionof Investmentsand Propertyand Equipment ContributionofInvestmentsandPropertyandEquipment	0	usd
CY2021	dhil	Contributionof Investmentsand Propertyand Equipment ContributionofInvestmentsandPropertyandEquipment	366555	usd
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	7820315	usd
CY2023	dhil	Proceeds Received Under Employee Stock Purchase Plan ProceedsReceivedUnderEmployeeStockPurchasePlan	409790	usd
CY2022	dhil	Proceeds Received Under Employee Stock Purchase Plan ProceedsReceivedUnderEmployeeStockPurchasePlan	526285	usd
CY2021	dhil	Proceeds Received Under Employee Stock Purchase Plan ProceedsReceivedUnderEmployeeStockPurchasePlan	603268	usd
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-46666923	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-62871597	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-71504545	usd
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-16203423	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-17355091	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-17927809	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	63195302	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	80550393	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	98478202	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	46991879	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	63195302	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	80550393	usd
CY2023	us-gaap	Income Taxes Paid IncomeTaxesPaid	12863429	usd
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	20879724	usd
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	26401643	usd
CY2023	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	0	usd
CY2022	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	487870	usd
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	529806	usd
CY2022	dhil	Contributionof Investmentsand Propertyand Equipment ContributionofInvestmentsandPropertyandEquipment	0	usd
CY2021	dhil	Contributionof Investmentsand Propertyand Equipment ContributionofInvestmentsandPropertyandEquipment	366555	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	8900000	usd
CY2023Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	10200000	usd
CY2023Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	10200000	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	8900000	usd
CY2023	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	136716371	usd
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	182193837	usd
CY2022Q4	us-gaap	Investments Investments	145675711	usd
CY2023	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	136716371	usd
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	154496019	usd
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	182193837	usd
CY2023Q4	us-gaap	Equity Method Investments EquityMethodInvestments	84530289	usd
CY2022Q4	us-gaap	Equity Method Investments EquityMethodInvestments	24105808	usd
CY2023Q4	us-gaap	Investments Investments	147738862	usd
CY2023Q4	us-gaap	Equity Method Investments EquityMethodInvestments	84530289	usd
CY2022Q4	us-gaap	Equity Method Investments EquityMethodInvestments	24105808	usd
CY2023Q4	us-gaap	Investments Investments	147738862	usd
CY2022Q4	us-gaap	Investments Investments	145675711	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	44171397	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	60412001	usd
CY2023	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	39096	usd
CY2022	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	-118408	usd
CY2021	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	15676405	usd
CY2023	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	15690012	usd
CY2022	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	-24082672	usd
CY2021	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	-2352649	usd
CY2023	us-gaap	Investment Income Dividend InvestmentIncomeDividend	7517393	usd
CY2022	us-gaap	Investment Income Dividend InvestmentIncomeDividend	4193792	usd
CY2021	us-gaap	Investment Income Dividend InvestmentIncomeDividend	3221448	usd
CY2023	dhil	Investment Income Other Incomeloss InvestmentIncomeOtherIncomeloss	-175060	usd
CY2022	dhil	Investment Income Other Incomeloss InvestmentIncomeOtherIncomeloss	-179223	usd
CY2021	dhil	Investment Income Other Incomeloss InvestmentIncomeOtherIncomeloss	-163988	usd
CY2023	us-gaap	Investment Income Net InvestmentIncomeNet	23071441	usd
CY2022	us-gaap	Investment Income Net InvestmentIncomeNet	-20186511	usd
CY2021	us-gaap	Investment Income Net InvestmentIncomeNet	16381216	usd
CY2023Q4	dhil	Equity Method Investment Deferred Compensation Plan Investments EquityMethodInvestmentDeferredCompensationPlanInvestments	6900000	usd
CY2022Q4	us-gaap	Equity Method Investments EquityMethodInvestments	24105808	usd
CY2023	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	9728056	usd
CY2022	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-405393	usd
CY2021	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	914855	usd
CY2023	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	39096	usd
CY2022	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	-118408	usd
CY2021	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	15676405	usd
CY2023	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	15690012	usd
CY2022	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	-24082672	usd
CY2021	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	-2352649	usd
CY2023	us-gaap	Investment Income Dividend InvestmentIncomeDividend	7517393	usd
CY2022	us-gaap	Investment Income Dividend InvestmentIncomeDividend	4193792	usd
CY2021	us-gaap	Investment Income Dividend InvestmentIncomeDividend	3221448	usd
CY2023	dhil	Investment Income Other Incomeloss InvestmentIncomeOtherIncomeloss	-175060	usd
CY2022	dhil	Investment Income Other Incomeloss InvestmentIncomeOtherIncomeloss	-179223	usd
CY2021	dhil	Investment Income Other Incomeloss InvestmentIncomeOtherIncomeloss	-163988	usd
CY2023	us-gaap	Investment Income Net InvestmentIncomeNet	23071441	usd
CY2022	us-gaap	Investment Income Net InvestmentIncomeNet	-20186511	usd
CY2021	us-gaap	Investment Income Net InvestmentIncomeNet	16381216	usd
CY2023Q4	dhil	Equity Method Investment Deferred Compensation Plan Investments EquityMethodInvestmentDeferredCompensationPlanInvestments	6900000	usd
CY2023Q4	us-gaap	Equity Method Investments EquityMethodInvestments	84530289	usd
CY2022Q4	us-gaap	Equity Method Investments EquityMethodInvestments	24105808	usd
CY2023	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	9728056	usd
CY2022	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-405393	usd
CY2021	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	914855	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	44171397	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	60412001	usd
CY2023Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000	shares
CY2023	dhil	Amortization Of Restricted Stock Grants AmortizationOfRestrictedStockGrants	11600000	usd
CY2022	dhil	Amortization Of Restricted Stock Grants AmortizationOfRestrictedStockGrants	10500000	usd
CY2021	dhil	Amortization Of Restricted Stock Grants AmortizationOfRestrictedStockGrants	7200000	usd
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	13800000	usd
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	9100000	usd
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	5200000	usd
CY2023Q4	us-gaap	Deferred Compensation Equity DeferredCompensationEquity	15400000	usd
CY2023Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000	shares
CY2023	dhil	Amortization Of Restricted Stock Grants AmortizationOfRestrictedStockGrants	11600000	usd
CY2022	dhil	Amortization Of Restricted Stock Grants AmortizationOfRestrictedStockGrants	10500000	usd
CY2021	dhil	Amortization Of Restricted Stock Grants AmortizationOfRestrictedStockGrants	7200000	usd
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	13800000	usd
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	9100000	usd
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	5200000	usd
CY2023Q4	us-gaap	Deferred Compensation Equity DeferredCompensationEquity	15400000	usd
CY2023	dhil	Deferred Compensation Arrangement Fully Vested Employee Elected Deferral Period Minimum DeferredCompensationArrangementFullyVestedEmployeeElectedDeferralPeriodMinimum	P5Y
CY2023Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	36100000	usd
CY2022Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	30700000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	0.003
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	0.001
CY2023	dhil	Deferred Compensation Arrangement Fully Vested Employee Elected Deferral Period Minimum DeferredCompensationArrangementFullyVestedEmployeeElectedDeferralPeriodMinimum	P5Y
CY2022Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	30700000	usd
CY2023	dhil	Lessee Leasing Agreements Operating Leases Areaunder Lease LesseeLeasingAgreementsOperatingLeasesAreaunderLease	37829	sqft
CY2023Q4	us-gaap	Property Subject To Or Available For Operating Lease Number Of Units PropertySubjectToOrAvailableForOperatingLeaseNumberOfUnits	1	location
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	600000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	1100000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	800000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	1400000	usd
CY2023	us-gaap	Lease Cost LeaseCost	908516	usd
CY2022	us-gaap	Lease Cost LeaseCost	918496	usd
CY2021	us-gaap	Lease Cost LeaseCost	932637	usd
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	4119580	usd
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	6472120	usd
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2783768	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1410106	usd
CY2023	dhil	Lessee Leasing Agreements Operating Leases Areaunder Lease LesseeLeasingAgreementsOperatingLeasesAreaunderLease	37829	sqft
CY2023Q4	us-gaap	Property Subject To Or Available For Operating Lease Number Of Units PropertySubjectToOrAvailableForOperatingLeaseNumberOfUnits	1	location
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	600000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	1100000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	800000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	1400000	usd
CY2023	us-gaap	Lease Cost LeaseCost	908516	usd
CY2022	us-gaap	Lease Cost LeaseCost	918496	usd
CY2021	us-gaap	Lease Cost LeaseCost	932637	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	624179	usd
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CY2023	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.264
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CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2948625	shares
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CY2023	us-gaap	Net Income Loss NetIncomeLoss	42226422	usd
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CY2021	us-gaap	Net Income Loss NetIncomeLoss	74200609	usd
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2948625	shares
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CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	3107604	shares
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CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	3179497	shares
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	14.32
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	13.01
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CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	13.01
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	23.34
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	14.32
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	13.01
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CY2023Q4	ecd	Non Rule10b51 Arr Trmntd Flag NonRule10b51ArrTrmntdFlag	false

Files In Submission

Name	View Source	Status
dhil-20231231_htm.xml	Edgar Link	completed
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0000909108-24-000008-index.html	Edgar Link	pending
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dhil-20231231.htm	Edgar Link	pending
dhil-20231231.xsd	Edgar Link	pending
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dhil-20231231xexx311.htm	Edgar Link	pending
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R7.htm	Edgar Link	pending
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dhil-20231231_cal.xml	Edgar Link	unprocessable

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$DHIL
DIAMOND HILL INVESTMENT GROUP INC Stock $dhil

2024 Q1 Form 10-K Financial Statement

#000090910824000008 Filed on February 29, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$DHIL DIAMOND HILL INVESTMENT GROUP INC Stock $dhil

2024 Q1 Form 10-K Financial Statement

#000090910824000008 Filed on February 29, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$DHIL
DIAMOND HILL INVESTMENT GROUP INC Stock $dhil