Cover - shares	6 Months Ended
	Jun. 30, 2021	Aug. 02, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2021
Document Transition Report	false
Entity File Number	1-35746
Entity Registrant Name	Bryn Mawr Bank Corp
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	23-2434506
Entity Address, Address Line One	801 Lancaster Avenue
Entity Address, City or Town	Bryn Mawr
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19010
City Area Code	610
Local Phone Number	525-1700
Title of 12(b) Security	Common Stock, $1 par value
Trading Symbol	BMTC
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		19,878,141
Entity Central Index Key	0000802681
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Amendment Flag	false