Consolidated Statements of Changes In Shareholders' Equity - USD ($) $ in Thousands	Total	First Priority Financial Corp. [Member]	[2]	Scottdale Bank and Trust Company [Member]	[3]	Series D [Member]	Series D [Member] First Priority Financial Corp. [Member]	Previously Reported [Member]	Impact of Adoption of New Accounting Standard [Member]		Preferred Stock [Member]	Preferred Stock [Member] Series D [Member]	Preferred Stock [Member] Series D [Member] First Priority Financial Corp. [Member]	Preferred Stock [Member] Previously Reported [Member]	Common Stock [Member]	Common Stock [Member] First Priority Financial Corp. [Member]	[2]	Common Stock [Member] Scottdale Bank and Trust Company [Member]	[3]	Common Stock [Member] Previously Reported [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] First Priority Financial Corp. [Member]	[2]	Additional Paid-in Capital [Member] Scottdale Bank and Trust Company [Member]	[3]	Additional Paid-in Capital [Member] Previously Reported [Member]	Retained Earnings [Member]	Retained Earnings [Member] Series D [Member]	Retained Earnings [Member] Previously Reported [Member]	Retained Earnings [Member] Impact of Adoption of New Accounting Standard [Member]		Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Other Comprehensive Income (Loss) [Member] Previously Reported [Member]	Accumulated Other Comprehensive Income (Loss) [Member] Impact of Adoption of New Accounting Standard [Member]	[1]	Treasury Stock [Member]	Treasury Stock [Member] Previously Reported [Member]
Balance at Dec. 31, 2017	$ 75,694							$ 75,703	$ (9)	[1]					$ 4,242					$ 4,242	$ 40,970					$ 40,970	$ 32,521		$ 32,565	$ (44)	[1]	$ (2,039)	$ (2,074)	$ 35
Accounting Standards Update Extensible List	us-gaap:AccountingStandardsUpdate201601Member										us-gaap:AccountingStandardsUpdate201601Member				us-gaap:AccountingStandardsUpdate201601Member						us-gaap:AccountingStandardsUpdate201601Member						us-gaap:AccountingStandardsUpdate201601Member					us-gaap:AccountingStandardsUpdate201601Member				us-gaap:AccountingStandardsUpdate201601Member
Net income	$ 10,596																										$ 10,596
Total other comprehensive (loss) income, net of taxes	(339)																															$ (339)
Stock issued to shareholders		$ 76,122		$ 64,181			$ 3,404						$ 3,404			$ 2,321		$ 1,879				$ 73,801		$ 62,302
Preferred stock dividends						$ (102)																						$ (102)
Preferred stock redemption						$ (3,404)						$ (3,404)
Common stock dividends declared	(3,453)																										(3,453)
Employee Stock Purchase Plan	119														$ 4						$ 115
Director Stock Purchase Plan	124														4						120
Restricted stock activity	267														10						257
Balance at Dec. 31, 2018	$ 223,525							$ 223,209	$ 316	[4]				$ 0	$ 8,460					$ 8,460	$ 177,565					$ 177,565	$ 39,878		$ 39,562	$ 316	[4]	$ (2,378)	$ (2,378)				$ 0
Accounting Standards Update Extensible List	us-gaap:AccountingStandardsUpdate201602Member										us-gaap:AccountingStandardsUpdate201602Member				us-gaap:AccountingStandardsUpdate201602Member						us-gaap:AccountingStandardsUpdate201602Member						us-gaap:AccountingStandardsUpdate201602Member					us-gaap:AccountingStandardsUpdate201602Member				us-gaap:AccountingStandardsUpdate201602Member
Net income	$ 17,701																										$ 17,701
Total other comprehensive (loss) income, net of taxes	2,721																															$ 2,721
Common stock dividends declared	(6,688)																										(6,688)
Employee Stock Purchase Plan	134														$ 5						$ 129
Director Stock Purchase Plan	135														5						130
Restricted stock activity	346														11						335
Balance at Dec. 31, 2019	237,874										$ 0				8,481						178,159						50,891					343				$ 0
Net income	26,209																										26,209
Total other comprehensive (loss) income, net of taxes	(400)																															(400)
Common stock dividends declared	(6,925)																										(6,925)
Repurchased stock	(1,795)																																			(1,795)
Employee Stock Purchase Plan	155														8						147
Director Stock Purchase Plan	156														8						148
Restricted stock activity	414														15						399
Balance at Dec. 31, 2020	$ 255,688										$ 0				$ 8,512						$ 178,853						$ 70,175					$ (57)				$ (1,795)

[1] Represents the impact of adopting Accounting Standard Update ASU 2016-01. See Note 25, Recent Accounting Pronouncements, to the consolidated financial statements for more information.

[2] Shares issued on July 31, 2018 as a result of the acquisition of First Priority Financial Corp. (“First Priority”).  See Note 5, Acquisition of First Priority Financial Corp., to the consolidated financial statements for more information.

[3] Shares issued on January 8, 2018 as a result of the acquisition of The Scottdale Bank & Trust Company (“Scottdale”).  See Note 4, Acquisition of The Scottdale Bank and Trust Company, to the consolidated financial statements for more information.

[4] Represents the impact of adopting Accounting Standard Update ASU 2016-02. See Note 25, Recent Accounting Pronouncements, to the consolidated financial statements for more information.