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Accumulated Other Comprehensive Income (Loss) (Tables) | 3 Months Ended
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Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss). |
Accumulated Other Comprehensive Income (Loss) | The following table represents changes in accumulated other comprehensive income (loss) by component, net of tax, for the periods below (dollars in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31,
​ |  | 2021 | ​ | 2020
​ | ​ | ​ | Before Tax | ​ | ​ | Tax Effect | ​ | ​ | Net of Tax | ​ | ​ | Before Tax | ​ | ​ | Tax Effect | ​ | ​ | Net of Tax
Unrealized gains (losses) on debt securities available for sale: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at beginning of period | ​ | $ | 49,644 | ​ | $ | (14,151) | ​ | $ | 35,493 | ​ | $ | 21,192 | ​ | $ | (6,032) | ​ | $ | 15,160
Unrealized holding gains (losses) on debt securities available for sale, net | ​ | ​ | (42,072) | ​ | ​ | 11,993 | ​ | ​ | (30,079) | ​ | ​ | 30,086 | ​ | ​ | (8,589) | ​ | ​ | 21,497
Amounts reclassified from accumulated other comprehensive income, net | ​ | ​ | (25) | ​ | ​ | 7 | ​ | ​ | (18) | ​ | ​ | (1,556) | ​ | ​ | 448 | ​ | ​ | (1,108)
Balance at end of period | ​ | $ | 7,547 | ​ | $ | (2,151) | ​ | $ | 5,396 | ​ | $ | 49,722 | ​ | $ | (14,173) | ​ | $ | 35,549
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unrealized gains (losses) on cash flow hedges: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at beginning of period | ​ | $ | (3,055) | ​ | $ | 871 | ​ | $ | (2,184) | ​ | $ | (280) | ​ | $ | 80 | ​ | $ | (200)
Unrealized holding gains (losses) on cash flow hedges, net | ​ | ​ | 574 | ​ | ​ | (164) | ​ | ​ | 410 | ​ | ​ | (3,129) | ​ | ​ | 892 | ​ | ​ | (2,237)
Amounts reclassified from accumulated other comprehensive income, net | ​ | ​ | 278 | ​ | ​ | (79) | ​ | ​ | 199 | ​ | ​ | (15) | ​ | ​ | 4 | ​ | ​ | (11)
Balance at end of period | ​ | $ | (2,203) | ​ | $ | 628 | ​ | $ | (1,575) | ​ | $ | (3,424) | ​ | $ | 976 | ​ | $ | (2,448)
Total accumulated other comprehensive income (loss) | ​ | $ | 5,344 | ​ | $ | (1,523) | ​ | $ | 3,821 | ​ | $ | 46,298 | ​ | $ | (13,197) | ​ | $ | 33,101

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