XML 63 R21.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Stock-Based Compensation (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Roll-forward of outstanding restricted stock grants issued | The following table represents a roll-forward of outstanding restricted stock grants issued pursuant to the 2011 and 2005 Plans and related activity during the years ended December 31, 2013 and 2012:
| Shares |  | Weighted-Average Grant Date Price per Share
Outstanding restricted stock grants as of December 31, 2011 | 260,621 |  |  | $ | 73.78 |
Grants issued | 107,600 |  |  | 75.64 |
Grants vested | (46,056 | ) |  | 75.22 |
Grants forfeited | (2,177 | ) |  | 71.37 |
Outstanding restricted stock grants as of December 31, 2012 | 319,988 |  |  | $ | 74.22 |
Grants issued | 32,000 |  |  | 85.63 |
Grants vested | (39,749 | ) |  | 80.77 |
Grants forfeited | (140 | ) |  | 77.81 |
Total outstanding restricted stock grants as of December 31, 2013 | 312,099 |  |  | $ | 74.17 |
Expense recognition of deferred compensation | Compensation expense recognition of deferred compensation over the remaining vesting periods, adjusted for estimated forfeitures, is as follows:
2014 |  | 2015 |  | 2016 |  | 2017 |  | 2018 |  | Total
$ | 4,647,324 |  |  | $ | 3,588,155 |  |  | $ | 1,641,218 |  |  | $ | 1,024,797 |  |  | $ | 261,197 |  |  | $ | 11,162,691 |
Schedule of Grants Issued and Grant Date Fair Value | The following table represents stock grant transactions during the years ended December 31, 2013, 2012, and 2011:
| Shares Issued |  | Grant Date Value
December 31, 2013 | 59,006 |  |  | $ | 4,606,008 |
December 31, 2012 | 71,949 |  |  | 5,540,792 |
December 31, 2011 | 103,899 |  |  | 7,691,800 |
Summary of company expenses attributable to the 401(k) Plan | The following table summarizes the Company’s expenses attributable to the plan during the years ended December 31, 2013, 2012 and 2011:
2013 |  | 2012 |  | 2011
$ | 1,171,154 |  |  | $ | 1,044,255 |  |  | $ | 960,888 |

X
- Definition Schedule of expense recognition of deferred compensation arrangement. + References No definition available. + Details
Name: | dhil_ScheduleOfExpenseRecognitionOfDeferredCompensationArrangementTableTextBlock
Namespace Prefix: | dhil_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the total intrinsic value of options exercised (or share units converted), share-based liabilities paid, and the total fair value of shares vested during the year. + 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 (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrantDateIntrinsicValueTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
Name: | us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration