Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Jul. 25, 2019
Document And Entity Information [Abstract]
Document Quarterly Report	true
Document Transition Report	false
Entity Registrant Name	PERFICIENT INC
Entity Central Index Key	0001085869
Current Fiscal Year End Date	--12-31
Document Type	10-Q
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity File Number	001-15169
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	74-2853258
Entity Address, Address Line One	555 Maryville University Drive
Entity Address, Address Line Two	Suite 600
Entity Address, City or Town	Saint Louis
Entity Address, State or Province	MO
Entity Address, Postal Zip Code	63141
City Area Code	314
Local Phone Number	529-3600
Title of 12(b) Security	Common Stock, $0.001 par value
Trading Symbol	PRFT
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		32,841,276