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Consolidated Statements of Changes In Shareholders' Equity - USD ($) $ in Thousands | Total | Series D [Member] | Scottdale Bank and Trust Company [Member] | First Priority Financial Corp. [Member] | First Priority Financial Corp. [Member] Series D [Member] | Preferred Stock [Member] | Preferred Stock [Member] First Priority Financial Corp. [Member] Series D [Member] | Common Stock [Member] | Common Stock [Member] Scottdale Bank and Trust Company [Member] | Common Stock [Member] First Priority Financial Corp. [Member] | Additional Paid-in Capital [Member] | Additional Paid-in Capital [Member] Scottdale Bank and Trust Company [Member] | Additional Paid-in Capital [Member] First Priority Financial Corp. [Member] | Retained Earnings [Member] | Retained Earnings [Member] Series D [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2017 | $ 75,703 |  |  |  |  |  |  | $ 4,242 |  |  | $ 40,970 |  |  | $ 32,565 |  | $ (2,074)
Impact of adoption of new accounting standard (ASU 2016-01 [Member]) at Dec. 31, 2017 | (9) |  |  |  |  |  |  |  |  |  |  |  |  | (44) |  | 35
Balance at Dec. 31, 2017 | 75,694 |  |  |  |  |  |  | 4,242 |  |  | 40,970 |  |  | 32,521 |  | (2,039)
Net income | 1,004 |  |  |  |  |  |  |  |  |  |  |  |  | 1,004 |  |
Total other comprehensive (loss) income, net of taxes | (1,867) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,867)
Stock issued to shareholders |  |  | $ 64,181 |  |  |  |  |  | $ 1,879 |  |  | $ 62,302 |  |  |  |
Employee Stock Purchase Plan | 24 |  |  |  |  |  |  | 1 |  |  | 23 |  |  |  |  |
Director Stock Purchase Plan | 30 |  |  |  |  |  |  | 1 |  |  | 29 |  |  |  |  |
Restricted stock activity | 58 |  |  |  |  |  |  |  |  |  | 58 |  |  |  |  |
Balance at Mar. 31, 2018 | 139,124 |  |  |  |  |  |  | 6,123 |  |  | 103,382 |  |  | 33,525 |  | (3,906)
Balance at Dec. 31, 2017 | 75,703 |  |  |  |  |  |  | 4,242 |  |  | 40,970 |  |  | 32,565 |  | (2,074)
Impact of adoption of new accounting standard (ASU 2016-01 [Member]) at Dec. 31, 2017 | (9) |  |  |  |  |  |  |  |  |  |  |  |  | (44) |  | 35
Balance at Dec. 31, 2017 | 75,694 |  |  |  |  |  |  | 4,242 |  |  | 40,970 |  |  | 32,521 |  | (2,039)
Net income | 5,947 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total other comprehensive (loss) income, net of taxes | (1,652) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at Sep. 30, 2018 | 221,835 |  |  |  |  | $ 3,404 |  | 8,457 |  |  | 177,421 |  |  | 36,244 |  | (3,691)
Balance at Mar. 31, 2018 | 139,124 |  |  |  |  |  |  | 6,123 |  |  | 103,382 |  |  | 33,525 |  | (3,906)
Net income | 2,779 |  |  |  |  |  |  |  |  |  |  |  |  | 2,779 |  |
Total other comprehensive (loss) income, net of taxes | 672 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 672
Common stock dividends declared | (918) |  |  |  |  |  |  |  |  |  |  |  |  | (918) |  |
Employee Stock Purchase Plan | 32 |  |  |  |  |  |  | 1 |  |  | 31 |  |  |  |  |
Director Stock Purchase Plan | 31 |  |  |  |  |  |  | 1 |  |  | 30 |  |  |  |  |
Restricted stock activity | 55 |  |  |  |  |  |  |  |  |  | 55 |  |  |  |  |
Balance at Jun. 30, 2018 | 141,775 |  |  |  |  |  |  | 6,125 |  |  | 103,498 |  |  | 35,386 |  | (3,234)
Net income | 2,164 |  |  |  |  |  |  |  |  |  |  |  |  | 2,164 |  |
Total other comprehensive (loss) income, net of taxes | (457) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (457)
Stock issued to shareholders |  |  |  | $ 76,122 | $ 3,404 |  | $ 3,404 |  |  | $ 2,321 |  |  | $ 73,801 |  |  |
Common stock dividends declared | (1,268) |  |  |  |  |  |  |  |  |  |  |  |  | (1,268) |  |
Preferred stock dividends |  | $ (38) |  |  |  |  |  |  |  |  |  |  |  |  | $ (38) |
Employee Stock Purchase Plan | 29 |  |  |  |  |  |  | 1 |  |  | 28 |  |  |  |  |
Director Stock Purchase Plan | 31 |  |  |  |  |  |  | 1 |  |  | 30 |  |  |  |  |
Restricted stock activity | 73 |  |  |  |  |  |  | 9 |  |  | 64 |  |  |  |  |
Balance at Sep. 30, 2018 | 221,835 |  |  |  |  | $ 3,404 |  | 8,457 |  |  | 177,421 |  |  | 36,244 |  | (3,691)
Balance at Dec. 31, 2018 | 223,209 |  |  |  |  |  |  | 8,460 |  |  | 177,565 |  |  | 39,562 |  | (2,378)
Impact of adoption of new accounting standard (ASU 2016-01 [Member]) at Dec. 31, 2018 | 316 |  |  |  |  |  |  |  |  |  |  |  |  | 316 |  |
Balance at Dec. 31, 2018 | 223,525 |  |  |  |  |  |  | 8,460 |  |  | 177,565 |  |  | 39,878 |  | (2,378)
Net income | 4,077 |  |  |  |  |  |  |  |  |  |  |  |  | 4,077 |  |
Total other comprehensive (loss) income, net of taxes | 1,807 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,807
Common stock dividends declared | (2,113) |  |  |  |  |  |  |  |  |  |  |  |  | (2,113) |  |
Employee Stock Purchase Plan | 28 |  |  |  |  |  |  | 1 |  |  | 27 |  |  |  |  |
Director Stock Purchase Plan | 33 |  |  |  |  |  |  | 1 |  |  | 32 |  |  |  |  |
Restricted stock activity | 80 |  |  |  |  |  |  |  |  |  | 80 |  |  |  |  |
Balance at Mar. 31, 2019 | 227,437 |  |  |  |  |  |  | 8,462 |  |  | 177,704 |  |  | 41,842 |  | (571)
Balance at Dec. 31, 2018 | 223,209 |  |  |  |  |  |  | 8,460 |  |  | 177,565 |  |  | 39,562 |  | (2,378)
Impact of adoption of new accounting standard (ASU 2016-01 [Member]) at Dec. 31, 2018 | 316 |  |  |  |  |  |  |  |  |  |  |  |  | 316 |  |
Balance at Dec. 31, 2018 | 223,525 |  |  |  |  |  |  | 8,460 |  |  | 177,565 |  |  | 39,878 |  | (2,378)
Net income | 13,293 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total other comprehensive (loss) income, net of taxes | 2,509 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at Sep. 30, 2019 | 234,612 |  |  |  |  |  |  | 8,478 |  |  | 177,994 |  |  | 48,009 |  | 131
Balance at Mar. 31, 2019 | 227,437 |  |  |  |  |  |  | 8,462 |  |  | 177,704 |  |  | 41,842 |  | (571)
Net income | 4,403 |  |  |  |  |  |  |  |  |  |  |  |  | 4,403 |  |
Total other comprehensive (loss) income, net of taxes | 797 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 797
Common stock dividends declared | (1,524) |  |  |  |  |  |  |  |  |  |  |  |  | (1,524) |  |
Employee Stock Purchase Plan | 36 |  |  |  |  |  |  | 2 |  |  | 34 |  |  |  |  |
Director Stock Purchase Plan | 33 |  |  |  |  |  |  | 1 |  |  | 32 |  |  |  |  |
Restricted stock activity | 80 |  |  |  |  |  |  |  |  |  | 80 |  |  |  |  |
Balance at Jun. 30, 2019 | 231,262 |  |  |  |  |  |  | 8,465 |  |  | 177,850 |  |  | 44,721 |  | 226
Net income | 4,813 |  |  |  |  |  |  |  |  |  |  |  |  | 4,813 |  |
Total other comprehensive (loss) income, net of taxes | (95) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (95)
Common stock dividends declared | (1,525) |  |  |  |  |  |  |  |  |  |  |  |  | (1,525) |  |
Employee Stock Purchase Plan | 31 |  |  |  |  |  |  | 1 |  |  | 30 |  |  |  |  |
Director Stock Purchase Plan | 35 |  |  |  |  |  |  | 1 |  |  | 34 |  |  |  |  |
Restricted stock activity | 91 |  |  |  |  |  |  | 11 |  |  | 80 |  |  |  |  |
Balance at Sep. 30, 2019 | $ 234,612 |  |  |  |  |  |  | $ 8,478 |  |  | $ 177,994 |  |  | $ 48,009 |  | $ 131

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