XML 23 R37.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Stock-Based Compensation - Summary of Deferred Compensation Expense Recognition (Details) (Restricted Stock Units (RSUs), USD $) | Dec. 31, 2014
--- | ---
Restricted Stock Units (RSUs) |
Expense recognition of deferred compensation |
2015 | $ 5,723,105 dhil_EmployeeServiceShareBasedCompensationNonvestedAwardsCompensationCostNotYetRecognizedInYearOne / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember
2016 | 2,708,516 dhil_EmployeeServiceShareBasedCompensationNonvestedAwardsCompensationCostNotYetRecognizedInYearTwo / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember
2017 | 2,180,245 dhil_EmployeeServiceShareBasedCompensationNonvestedAwardsCompensationCostNotYetRecognizedInYearThree / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember
2018 | 1,436,301 dhil_EmployeeServiceShareBasedCompensationNonvestedAwardsCompensationCostNotYetRecognizedInYearFour / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember
2019 | 517,966 dhil_EmployeeServiceShareBasedCompensationNonvestedAwardsCompensationCostNotYetRecognizedInYearFive / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember
Total | $ 12,566,133 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember

X
- Definition Employee service share based compensation nonvested awards compensation cost not yet recognized in year five. + References No definition available. + Details
Name: | dhil_EmployeeServiceShareBasedCompensationNonvestedAwardsCompensationCostNotYetRecognizedInYearFive
Namespace Prefix: | dhil_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Employee service share based compensation nonvested awards compensation cost not yet recognized in year four + References No definition available. + Details
Name: | dhil_EmployeeServiceShareBasedCompensationNonvestedAwardsCompensationCostNotYetRecognizedInYearFour
Namespace Prefix: | dhil_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Employee service share based compensation nonvested awards compensation cost not yet recognized in year one. + References No definition available. + Details
Name: | dhil_EmployeeServiceShareBasedCompensationNonvestedAwardsCompensationCostNotYetRecognizedInYearOne
Namespace Prefix: | dhil_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Employee service share based compensation nonvested awards compensation cost not yet recognized in year three. + References No definition available. + Details
Name: | dhil_EmployeeServiceShareBasedCompensationNonvestedAwardsCompensationCostNotYetRecognizedInYearThree
Namespace Prefix: | dhil_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Employee service share based compensation nonvested awards compensation cost not yet recognized in year two. + References No definition available. + Details
Name: | dhil_EmployeeServiceShareBasedCompensationNonvestedAwardsCompensationCostNotYetRecognizedInYearTwo
Namespace Prefix: | dhil_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_DeferredCompensationArrangementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant