SIGNIFCANT ACCOUNTING POLICIES (Notes)	9 Months Ended
Sep. 30, 2017
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]	NEW ACCOUNTING STANDARDS In May 2014, the Financial Accounting Standards Board (the “FASB”) issued ASU No. 2014-09 (“Topic 606”), Revenue from Contracts with Customers. Topic 606 supersedes the revenue recognition requirements in Accounting Standards Codification Topic 605, Revenue Recognition, and requires entities to measure and recognize revenue and the related cash flows it expects to be entitled for the transfer of promised goods or services to customers and requires an entity to recognize the incremental costs of obtaining a contract with a customer as an asset if the entity expects to recover those costs over time. Topic 606 becomes effective for reporting periods beginning after December 15, 2017. Late in 2016, the Company initiated a project team to evaluate the impact of this standard, document the considerations for each revenue stream and begin the implementation process. The analysis identifying areas that will be impacted by the new guidance is substantially complete. As a result of the evaluation performed, the Company expects that there will be certain limited changes to the timing of revenue recognition for job posting and resume search over the contract period, primarily in the Healthcare segment, along with the deferral of certain commission expenses. DHI will adopt Topic 606 as of January 1, 2018, and expects to use the modified retrospective transition method applied to those contracts which were not completed as of that date. Upon adoption, the Company expects to recognize the cumulative effect of adopting this guidance as an adjustment to the opening balance of retained earnings. Prior periods will not be retrospectively adjusted. The cumulative effect of adoption is not expected to be material related to revenues. The Company is still evaluating the impact of adoption related to incremental costs. In March 2016, the FASB issued ASU No. 2016-09, Improvements to Employee Share-Based Payment Accounting. The Company adopted the standard during the three months ended March 31, 2017. The new standard requires all income tax effects of awards to be recognized in the income statement when the awards vest or are settled, rather than in additional paid-in capital. Accordingly, the new standard eliminates the requirement to reclassify excess tax benefits from operating activities to financing activities in the statement of cash flows. Additionally, the Company can now make a policy election to account for forfeitures as they occur. Amendments requiring recognition of excess tax benefits and tax deficiencies in the income statement were applied prospectively. The tax effect of awards vested resulted in income tax expense of $0.1 million and $0.9 million during the three and nine months ended September 30, 2017, respectively. The Company recast prior year cash flows to reflect the excess tax benefit as an operating activity, resulting in a reclassification of $0.4 million from “Excess tax benefit over book expense from stock based compensation” to “Income taxes receivable/payable” on the Condensed Consolidated Statements of Cash Flows. The Company will record forfeitures as they occur, rather than estimating in advance. On January 1, 2017, under the modified retrospective transition method as required by the standard, the Company recorded a cumulative-effect adjustment of $0.3 million to decrease accumulated earnings and increase additional paid-in capital to remove estimated forfeitures on all outstanding equity awards after December 31, 2016. In January 2017, the FASB issued ASU No. 2017-04, Intangibles-Goodwill and Other. The new standard eliminates Step 2 from the goodwill impairment test and now requires the Company to compare the fair value of a reporting unit with its carrying amount. The Company should recognize an impairment charge for the amount by which the carrying amount exceeds the fair value. The standard is effective for fiscal years beginning after December 15, 2019. In the event an impairment is indicated, the Company will consider early adopting the new impairment standard.

NEW ACCOUNTING STANDARDS

In May 2014, the Financial Accounting Standards Board (the “FASB”) issued ASU No. 2014-09 (“Topic 606”), Revenue from Contracts with Customers. Topic 606 supersedes the revenue recognition requirements in Accounting Standards Codification Topic 605, Revenue Recognition, and requires entities to measure and recognize revenue and the related cash flows it expects to be entitled for the transfer of promised goods or services to customers and requires an entity to recognize the incremental costs of obtaining a contract with a customer as an asset if the entity expects to recover those costs over time. Topic 606 becomes effective for reporting periods beginning after December 15, 2017. Late in 2016, the Company initiated a project team to evaluate the impact of this standard, document the considerations for each revenue stream and begin the implementation process. The analysis identifying areas that will be impacted by the new guidance is substantially complete. As a result of the evaluation performed, the Company expects that there will be certain limited changes to the timing of revenue recognition for job posting and resume search over the contract period, primarily in the Healthcare segment, along with the deferral of certain commission expenses.

DHI will adopt Topic 606 as of January 1, 2018, and expects to use the modified retrospective transition method applied to those contracts which were not completed as of that date. Upon adoption, the Company expects to recognize the cumulative effect of adopting this guidance as an adjustment to the opening balance of retained earnings. Prior periods will not be retrospectively adjusted. The cumulative effect of adoption is not expected to be material related to revenues. The Company is still evaluating the impact of adoption related to incremental costs.

In March 2016, the FASB issued ASU No. 2016-09, Improvements to Employee Share-Based Payment Accounting. The Company adopted the standard during the three months ended March 31, 2017. The new standard requires all income tax effects of awards to be recognized in the income statement when the awards vest or are settled, rather than in additional paid-in capital. Accordingly, the new standard eliminates the requirement to reclassify excess tax benefits from operating activities to financing activities in the statement of cash flows. Additionally, the Company can now make a policy election to account for forfeitures as they occur. Amendments requiring recognition of excess tax benefits and tax deficiencies in the income statement were applied prospectively. The tax effect of awards vested resulted in income tax expense of $0.1 million and $0.9 million during the three and nine months ended September 30, 2017, respectively. The Company recast prior year cash flows to reflect the excess tax benefit as an operating activity, resulting in a reclassification of $0.4 million from “Excess tax benefit over book expense from stock based compensation” to “Income taxes receivable/payable” on the Condensed Consolidated Statements of Cash Flows. The Company will record forfeitures as they occur, rather than estimating in advance. On January 1, 2017, under

the modified retrospective transition method as required by the standard, the Company recorded a cumulative-effect adjustment of $0.3 million to decrease accumulated earnings and increase additional paid-in capital to remove estimated forfeitures on all outstanding equity awards after December 31, 2016.

In January 2017, the FASB issued ASU No. 2017-04, Intangibles-Goodwill and Other. The new standard eliminates Step 2 from the goodwill impairment test and now requires the Company to compare the fair value of a reporting unit with its carrying amount. The Company should recognize an impairment charge for the amount by which the carrying amount exceeds the fair value. The standard is effective for fiscal years beginning after December 15, 2019. In the event an impairment is indicated, the Company will consider early adopting the new impairment standard.