Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest income:
Interest and fees on loans and leases	$ 155,916	$ 178,367	$ 168,638
Interest on cash and cash equivalents	295	543	264
Interest on investment securities:
Taxable	11,388	14,330	11,854
Non-taxable	77	143	293
Dividends	5	6	6
Total interest income	167,681	193,389	181,055
Interest expense:
Interest on deposits	16,971	35,936	20,552
Interest on short-term borrowings	702	2,792	3,392
Interest on FHLB advances and other borrowings	859	1,069	1,777
Interest on subordinated notes	4,426	4,578	4,575
Interest on junior subordinated debentures	936	1,373	1,288
Total interest expense	23,894	45,748	31,584
Net interest income	143,787	147,641	149,471
Provision for credit losses	41,677	8,595	7,089
Net interest income after provision for credit losses	102,110	139,046	142,382
Noninterest income:
Fees for wealth management services	44,532	44,400	42,326
Insurance commissions	5,911	6,877	6,808
Capital markets revenue	9,491	11,276	4,848
Service charges on deposits	2,868	3,374	2,989
Loan servicing and other fees	1,646	2,206	2,259
Net gain on sale of loans	5,779	2,342	3,283
Net gain on sale of investment securities available for sale	0	0	7
Net gain on sale of long-lived assets	2,297	0	0
Net gain (loss) on sale of other real estate owned ("OREO")	148	(84)	295
Dividends on FHLB and FRB stock	1,151	1,505	1,621
Other operating income	8,148	10,288	11,546
Total noninterest income	81,971	82,184	75,982
Noninterest expenses:
Salaries and wages	68,846	74,371	66,671
Employee benefits	12,605	13,456	12,918
Occupancy and bank premises	12,727	12,591	11,599
Furniture, fixtures, and equipment	9,432	9,693	8,407
Impairment of long-lived assets	1,605	0	0
Advertising	1,609	2,105	1,719
Amortization of intangible assets	3,567	3,801	3,656
Due diligence, merger-related and merger integration expenses	0	0	7,761
Professional fees	6,428	5,434	4,203
Pennsylvania bank shares tax	8	1,478	1,792
Data processing	5,777	5,517	4,942
Other operating expenses	20,123	17,981	16,739
Total noninterest expenses	142,727	146,427	140,407
Income before income taxes	41,354	74,803	77,957
Income tax expense	8,856	15,607	14,165
Net income	32,498	59,196	63,792
Net loss attributable to noncontrolling interest	(75)	(10)	0
Net income attributable to Bryn Mawr Bank Corporation	$ 32,573	$ 59,206	$ 63,792
Basic earnings per common share (in dollars per share)	$ 1.63	$ 2.94	$ 3.15
Diluted earnings per common share (in dollars per share)	1.63	2.93	3.13
Dividends declared per share (in dollars per share)	$ 1.06	$ 1.02	$ 0.94
Weighted-average basic shares outstanding (in shares)	19,970,921	20,142,306	20,234,792
Dilutive shares (in shares)	71,424	91,065	155,375
Adjusted weighted-average diluted shares (in shares)	20,042,345	20,233,371	20,390,167