Deferred compensation share-based arrangements liability current and noncurrent shares.

No definition available.

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- Definition

Deferred compensation share based arrangements liability current and noncurrent reclassified to additional paid in capital.

+ References

No definition available.

+ Details

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- Definition

Number of current employees holding unvested restricted awards.

+ References

No definition available.

+ Details

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

Share based compensation arrangement by share based payment award equity instruments other than options residual vested shares exchanged for common stock.

+ References

No definition available.

+ Details

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

Aggregate number of common shares reserved for future issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements.

+ References

No definition available.

+ Details

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- Definition

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

+ References

+ Details

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Period Type:	duration

- Definition

The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

+ Details

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Period Type:	duration

- Definition

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.

+ References

+ Details

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- Definition

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.

+ References

+ Details

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- Definition

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.

+ 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 (a)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901

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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).

+ References

+ Details

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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.

+ References

+ Details

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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.

+ References

No definition available.

+ Details

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

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- Definition

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

+ References

No definition available.

+ Details

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Data Type:	xbrli:sharesItemType
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Period Type:	duration

- Definition

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

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

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

+ References

+ Details

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Period Type:	duration

- Definition

Percentage of vesting of share-based compensation awards.

+ References

+ Details

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Balance Type:	na
Period Type:	duration

- 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.

+ References

+ Details

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- Details

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- Details

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- Details

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Shareholders' Equity - Additional Information (Details)	12 Months Ended
Shareholders' Equity - Additional Information (Details)	Dec. 31, 2017 USD ($) shares	Dec. 31, 2016 USD ($) shares	Dec. 31, 2015 USD ($) employee shares	Aug. 16, 2016 shares	Aug. 11, 2016 shares	Dec. 31, 2014 shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock shares authorized	250,000,000	250,000,000		250,000,000
Preferred stock, shares authorized	5,000,000	5,000,000		5,000,000
Stock options granted	853,896	683,001	889,849
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 \| $	$ 4,463,000	9,815,000	$ 22,324,000
Stock-based compensation liability reclassified to additional paid in capital \| $		10,500,000
Stock-based compensation liability \| $	0	0
Actual tax benefits recognized related to stock-based compensation \| $	$ 500,000	$ 1,000,000	$ 4,600,000
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	156,000	11,111	1,253,924
Unvested restricted stock awards held by employees	183,629	59,258	90,697			407,171
Shares granted and immediately vested	0	11,111	583,021
Stock-based compensation liability	0	0	231,229
Residual vested shares granted			351,851
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	1,009,896
Stock options granted		648,180
Shares available for future stock compensation grants	4,300,000	5,400,000
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 \| 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
Vesting percentage		33.00%
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 After 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	797,550	626,650
Award vesting period	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
Shares granted	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