Consolidated Statements of Changes in Shareholders' Equity - Unaudited - 9 months ended Sep. 30, 2018 - USD ($) $ in Thousands		Total	Common Stock	Paid-in Capital	Treasury Stock	Accumulated Other Comprehensive Loss	Retained Earnings	Noncontrolling Interest
Beginning balance (in shares) at Dec. 31, 2017		24,360,049	24,360,049
Beginning balance at Dec. 31, 2017		$ 528,119	$ 24,360	$ 371,486	$ (68,179)	$ (4,414)	$ 205,549	$ (683)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to Bryn Mawr Bank Corporation		46,656					46,656
Net income attributable to noncontrolling interest		5						5
Dividends paid or accrued, $0.69 per share		(14,099)					(14,099)
Other comprehensive loss, net of tax benefit of $2,389		(8,988)				(8,988)
Stock based compensation		1,944		1,944
Retirement of treasury stock (in shares)			(2,253)
Retirement of treasury stock		0	$ (2)	(20)	22
Net purchase of treasury stock from stock awards for statutory tax withholdings		(1,489)			(1,489)
Net treasury stock activity for deferred compensation trusts		52		153	(101)
Net purchase of treasury stock through publicly announced plans		(690)
Repurchase of warrants from U.S. Treasury		$ (1,755)		(1,853)			98
Common stock issued through share-based awards and options exercises (in shares)		63,825	172,387
Common stock issued through share-based awards and options exercises		$ 1,557	$ 172	1,385
Shares issued in acquisitions (in shares)	[1]		2,562
Shares issued in acquisitions	[1]	$ 113	$ 3	110
Ending balance (in shares) at Sep. 30, 2018		24,532,745	24,532,745
Ending balance at Sep. 30, 2018		$ 551,425	$ 24,533	$ 373,205	$ (70,437)	$ (13,402)	$ 238,204	$ (678)

[1] Shares relating to the RBPI Merger (defined in Note 3 – Business Combinations below) recorded in April 2018.