Change In Control - Additional Information (Details) - USD ($)			3 Months Ended	9 Months Ended	12 Months Ended
	Apr. 02, 2014	Mar. 31, 2014	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	May 31, 2014	Apr. 01, 2014
Business Acquisition [Line Items]
Purchase of outstanding shares								100.00%
Aggregate purchase price	$ 921,300,000
Acquisition and integration expenses				$ 9,297,000	$ 0	$ 0
Advisory fees				$ 3,300,000
Amount of excess cash generated								$ 6,100,000
Prepaid expenses and other current assets					16,074,000	11,896,000
Other assets					4,903,000	3,927,000
Other current liabilities					3,284,000	7,469,000
Other long-term liabilities					7,968,000	7,291,000
Merger Agreement
Business Acquisition [Line Items]
Aggregate purchase price		$ 921,298,000
Gain on final settlement of indemnifications					500,000
Prepaid expenses and other current assets					0	300,000
Other assets					0	500,000
Other current liabilities						1,400,000
Other long-term liabilities					0	$ 500,000
Merger Agreement | Maximum
Business Acquisition [Line Items]
Other current liabilities					$ 100,000
Predecessor
Business Acquisition [Line Items]
Acquisition and integration expenses			$ 12,420,000
Advisory fees			$ 10,100,000
Prior Acquisition | Cinven
Business Acquisition [Line Items]
Noncontrolling interest ownership percentage owned by parent		80.00%	80.00%
Post Acquisition | Cinven
Business Acquisition [Line Items]
Noncontrolling interest ownership percentage owned by parent							75.00%
Post Acquisition | Medpace Investors
Business Acquisition [Line Items]
Noncontrolling interest ownership percentage owned by noncontrolling							25.00%