Number of current employees holding unvested restricted awards.

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Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period, immediately vested.

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Share based compensation arrangement by share based payment award year of expiration.

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Share based compensation liability associated with modification to stock options reclassified to additional paid in capital.

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No definition available.

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Aggregate number of common shares reserved for future issuance.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
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Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements.

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No definition available.

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The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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-Name Accounting Standards Codification
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-Paragraph 2
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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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-Paragraph 2
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Description of award terms as to how many shares or portion of an award are no longer contingent on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, to sell the shares, and be entitled to the cash proceeds of such sale. For example, vesting may be expressed as being 25 percent of the shares under option on each anniversary of the grant date.

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General descriptive information regarding an arrangement under which employees and directors receive: (a) awards of equity shares, equity share options, or other equity instruments; or (b) the entity incurs liabilities to them: (1) in amounts based, at least in part, on the price of the entity's shares or other equity instruments; or (2) that require or may require settlement by issuance of the entity's shares. Such an arrangement is usually provided to employees and directors to compensate them, provide performance incentives to them, and to attract or retain their services. May also include pertinent information particular to a plan that is not elsewhere specified in the taxonomy.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

Gross number of share options (or share units) granted during the period.

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No definition available.

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- Definition

An excess of the fair value of the modified award over the fair value of the award immediately before the modification.

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Number of share instruments newly issued under a share-based compensation plan.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Shareholders' Equity - Additional Information (Details)	12 Months Ended
Shareholders' Equity - Additional Information (Details)	Dec. 31, 2018 USD ($) shares	Dec. 31, 2017 USD ($) shares	Dec. 31, 2016 USD ($) shares	Dec. 31, 2015 USD ($) employee shares	Aug. 11, 2016 shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options granted	584,301	853,896	683,001
Share-based payment award description				If Medpace Investors exercised the call right, it could do so up to the later of twelve months following the employee’s departure date or six months following the determination that the former employee was directly or indirectly engaged in competitive business activities
Incremental stock based compensation expense \| $			$ 3,100,000
Stock-based compensation expense \| $	$ 6,499,000	$ 4,463,000	9,815,000
Stock-based compensation liability associated with modified stock options reclassified to additional paid in capital \| $			10,500,000
Stock-based compensation liability \| $	0	0
Actual tax benefits recognized related to stock-based compensation \| $	$ 1,000,000.0	$ 500,000	$ 1,000,000.0
Vesting Equally on Second, Third and Fourth Anniversary of Grant Date Over Four Years
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options granted		15,000
Award vesting period		4 years
RSA Modification
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unvested restricted stock awards held by employees				688,599
Number of current employees holding unvested restricted stock \| employee				158
Incremental stock based compensation expense \| $				$ 0
Stock-based compensation expense \| $				$ 5,700,000
Restricted Shares (RSAs and RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares granted	300,200	156,000	11,111
Unvested restricted stock awards held by employees	421,200	183,629	59,258	90,697
Shares granted and immediately vested			11,111
2016 Incentive Award Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares registered and available for grant	6,000,000				6,000,000
Awards granted to employees	850,700	968,550
Stock options granted			648,180
Shares available for future stock compensation grants	3,800,000	4,300,000
Plan expiration year	2026
2016 Incentive Award Plan \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation option terms	10 years
2016 Incentive Award Plan \| Non-employee Directors
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options granted	33,801
Award vesting description	These awards will vest on the earlier of (a) the day immediately preceding the date of the first annual meeting following the date of grant and (b) the first anniversary of the date of grant, subject to the non-employee director continuing in service through the applicable vesting date.
2016 Incentive Award Plan \| Vesting on October 31, 2016 and Eight equal monthly Installments
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options granted			21,530
Award vesting description	stock options with various vesting schedules, but all of which vest within a calendar year of the respective grant date
2016 Incentive Award Plan \| Vesting Over One Year \| Non-employee Directors
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options granted		41,346
Award vesting period		1 year
2016 Incentive Award Plan \| Stock Options \| Vesting After Four Years
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options granted	550,500	797,550	626,650
Award vesting period	4 years	4 years	4 years
2016 Incentive Award Plan \| Restricted Stock Awards (RSA) \| Vesting After Four Years
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period		4 years
Shares granted		118,000
2016 Incentive Award Plan \| Restricted Stock Units (RSU) \| Vesting After Four Years
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period	4 years	4 years
Shares granted	300,200	38,000
2014 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation option terms	7 years
Stock options granted			45,932
2014 Equity Incentive Plan \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period	4 years
2014 Equity Incentive Plan \| Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period	3 years
2014 Equity Incentive Plan \| Vesting Equally Over Four Years
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options granted			34,821
Award vesting period			4 years
2014 Equity Incentive Plan \| Fully Vested Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares granted			11,111