Consolidated Statements of Changes in Shareholders' Equity - Unaudited - 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
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	15,286					15,286
Net (loss) attributable to noncontrolling interest	(1)						(1)
Dividends paid or accrued, $0.25 per share	(4,495)					(4,495)
Other comprehensive income, net of tax expense of $1,125	(5,250)				(5,250)
Stock based compensation	620		620
Net purchase of treasury stock from stock awards for statutory tax withholdings	(626)			(626)
Net treasury stock activity for deferred compensation trusts	171		153	18
Repurchase of warrants from U.S. Treasury	(1,755)		(1,853)			98
Common stock issued through share-based awards and options exercises (in shares)		78,709
Common stock issued through share-based awards and options exercises	992	$ 79	913
Ending balance (in shares) at Mar. 31, 2018		24,438,758
Ending balance at Mar. 31, 2018	$ 533,061	$ 24,439	371,319	(68,787)	(9,664)	216,438	(684)
Beginning balance (in shares) at Dec. 31, 2018	24,545,348	24,545,348
Beginning balance at Dec. 31, 2018	$ 564,704	$ 24,545	374,010	(75,883)	(7,513)	250,230	(685)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to Bryn Mawr Bank Corporation	10,677					10,677
Net (loss) attributable to noncontrolling interest	(1)						(1)
Dividends paid or accrued, $0.25 per share	(5,094)					(5,094)
Other comprehensive income, net of tax expense of $1,125	4,235				4,235
Stock based compensation	1,137		1,137
Net purchase of treasury stock from stock awards for statutory tax withholdings	(34)			(34)
Purchase of treasury stock through publicly announced plans	$ (1,057)			(1,057)
Common stock issued through share-based awards and options exercises (in shares)	29,600	31,900
Common stock issued through share-based awards and options exercises	$ 540	$ 32	508
Ending balance (in shares) at Mar. 31, 2019	24,577,248	24,577,248
Ending balance at Mar. 31, 2019	$ 575,107	$ 24,577	$ 375,655	$ (76,974)	$ (3,278)	$ 255,813	$ (686)